WIP attempt to optimize buffer encoding parsing a little

Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>
Co-authored-by: Dave Caruso <me@paperdave.net>

.buildkite/Dockerfile

@@ -1,12 +1,12 @@
-ARG LLVM_VERSION="18"
-ARG REPORTED_LLVM_VERSION="18.1.8"
+ARG LLVM_VERSION="19"
+ARG REPORTED_LLVM_VERSION="19.1.7"
 ARG OLD_BUN_VERSION="1.1.38"
 ARG DEFAULT_CFLAGS="-mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -ffunction-sections -fdata-sections -faddrsig -fno-unwind-tables -fno-asynchronous-unwind-tables"
 ARG DEFAULT_CXXFLAGS="-flto=full -fwhole-program-vtables -fforce-emit-vtables"
 ARG BUILDKITE_AGENT_TAGS="queue=linux,os=linux,arch=${TARGETARCH}"
 
 FROM --platform=$BUILDPLATFORM ubuntu:20.04 as base-arm64
-FROM --platform=$BUILDPLATFORM ubuntu:18.04 as base-amd64
+FROM --platform=$BUILDPLATFORM ubuntu:20.04 as base-amd64
 FROM base-$TARGETARCH as base
 
 ARG LLVM_VERSION

.buildkite/ci.mjs

@@ -107,9 +107,9 @@ const buildPlatforms = [
   { os: "linux", arch: "aarch64", distro: "amazonlinux", release: "2023", features: ["docker"] },
   { os: "linux", arch: "x64", distro: "amazonlinux", release: "2023", features: ["docker"] },
   { os: "linux", arch: "x64", baseline: true, distro: "amazonlinux", release: "2023", features: ["docker"] },
-  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.20" },
-  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.20" },
-  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.20" },
+  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.21" },
+  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.21" },
+  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.21" },
   { os: "windows", arch: "x64", release: "2019" },
   { os: "windows", arch: "x64", baseline: true, release: "2019" },
 ];
@@ -134,9 +134,9 @@ const testPlatforms = [
   { os: "linux", arch: "x64", baseline: true, distro: "ubuntu", release: "24.04", tier: "latest" },
   { os: "linux", arch: "x64", baseline: true, distro: "ubuntu", release: "22.04", tier: "previous" },
   { os: "linux", arch: "x64", baseline: true, distro: "ubuntu", release: "20.04", tier: "oldest" },
-  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.20", tier: "latest" },
-  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.20", tier: "latest" },
-  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.20", tier: "latest" },
+  { os: "linux", arch: "aarch64", abi: "musl", distro: "alpine", release: "3.21", tier: "latest" },
+  { os: "linux", arch: "x64", abi: "musl", distro: "alpine", release: "3.21", tier: "latest" },
+  { os: "linux", arch: "x64", abi: "musl", baseline: true, distro: "alpine", release: "3.21", tier: "latest" },
   { os: "windows", arch: "x64", release: "2019", tier: "oldest" },
   { os: "windows", arch: "x64", release: "2019", baseline: true, tier: "oldest" },
 ];
@@ -323,6 +323,7 @@ function getCppAgent(platform, options) {
  */
 function getZigAgent(platform, options) {
   const { arch } = platform;
+
   return {
     queue: "build-zig",
   };
@@ -383,14 +384,22 @@ function getBuildEnv(target, options) {
   const { canary } = options;
   const revision = typeof canary === "number" ? canary : 1;
 
+  const isMusl = abi === "musl";
+
+  let CMAKE_BUILD_TYPE = release ? "Release" : profile === "debug" ? "Debug" : "RelWithDebInfo";
+  if (isMusl && release) {
+    CMAKE_BUILD_TYPE = "MinSizeRel";
+  }
+
   return {
-    CMAKE_BUILD_TYPE: release ? "Release" : profile === "debug" ? "Debug" : "RelWithDebInfo",
+    CMAKE_BUILD_TYPE,
     ENABLE_BASELINE: baseline ? "ON" : "OFF",
     ENABLE_CANARY: revision > 0 ? "ON" : "OFF",
     CANARY_REVISION: revision,
     ENABLE_ASSERTIONS: release ? "OFF" : "ON",
     ENABLE_LOGS: release ? "OFF" : "ON",
-    ABI: abi === "musl" ? "musl" : undefined,
+    ABI: isMusl ? "musl" : undefined,
+    CMAKE_TLS_VERIFY: "0",
   };
 }
 
@@ -462,7 +471,7 @@ function getBuildZigStep(platform, options) {
     cancel_on_build_failing: isMergeQueue(),
     env: getBuildEnv(platform, options),
     command: `bun run build:ci --target bun-zig --toolchain ${toolchain}`,
-    timeout_in_minutes: 25,
+    timeout_in_minutes: 35,
   };
 }
 
@@ -619,6 +628,21 @@ function getReleaseStep(buildPlatforms, options) {
   };
 }
 
+/**
+ * @returns {Step}
+ */
+function getBenchmarkStep() {
+  return {
+    key: "benchmark",
+    label: "📊",
+    agents: {
+      queue: "build-zig",
+    },
+    command: "bun .buildkite/scripts/upload-benchmark.ts",
+    depends_on: [`linux-x64-build-bun`],
+  };
+}
+
 /**
  * @typedef {Object} Pipeline
  * @property {Step[]} [steps]
@@ -1097,6 +1121,8 @@ async function getPipeline(options = {}) {
     steps.push(getReleaseStep(buildPlatforms, options));
   }
 
+  steps.push(getBenchmarkStep());
+
   /** @type {Map<string, GroupStep>} */
   const stepsByGroup = new Map();
 

.buildkite/scripts/upload-benchmark.ts

@@ -0,0 +1,7 @@
+import { getCommit, getSecret } from "../../scripts/utils.mjs";
+
+console.log("Submitting...");
+const response = await fetch(getSecret("BENCHMARK_URL") + "?tag=_&commit=" + getCommit() + "&artifact_url=_", {
+  method: "POST",
+});
+console.log("Got status " + response.status);

.buildkite/scripts/upload-release.sh

@@ -158,25 +158,36 @@ function upload_s3_file() {
   run_command aws --endpoint-url="$AWS_ENDPOINT" s3 cp "$file" "s3://$AWS_BUCKET/$folder/$file"
 }
 
-function send_bench_webhook() {
-  if [ -z "$BENCHMARK_URL" ]; then
-    echo "error: \$BENCHMARK_URL is not set"
-    # exit 1 # TODO: this isn't live yet
+function send_discord_announcement() {
+  local value=$(buildkite-agent secret get "BUN_ANNOUNCE_CANARY_WEBHOOK_URL")
+  if [ -z "$value" ]; then
+    echo "warn: BUN_ANNOUNCE_CANARY_WEBHOOK_URL not set, skipping Discord announcement"
     return
   fi
 
-  local tag="$1"
+  local version="$1"
   local commit="$BUILDKITE_COMMIT"
-  local artifact_path="${commit}"
+  local short_sha="${commit:0:7}"
+  local commit_url="https://github.com/oven-sh/bun/commit/$commit"
 
-  if [ "$tag" == "canary" ]; then
-    artifact_path="${commit}-canary"
+  if [ "$version" == "canary" ]; then
+    local json_payload=$(cat <<EOF
+{
+  "embeds": [{
+    "title": "New Bun Canary now available",
+    "description": "A new canary build of Bun has been automatically uploaded ([${short_sha}](${commit_url})). To upgrade, run:\n\n\`\`\`shell\nbun upgrade --canary\n\`\`\`\nCommit: \`${commit}\`",
+    "color": 16023551,
+    "timestamp": "$(date -u +%Y-%m-%dT%H:%M:%SZ)"
+  }]
+}
+EOF
+)
+    
+    curl -H "Content-Type: application/json" \
+         -d "$json_payload" \
+         -sf \
+         "$value" >/dev/null
   fi
-
-  local artifact_url="https://pub-5e11e972747a44bf9aaf9394f185a982.r2.dev/releases/$artifact_path/bun-linux-x64.zip"
-  local webhook_url="$BENCHMARK_URL?tag=$tag&commit=$commit&artifact_url=$artifact_url"
-  
-  curl -X POST "$webhook_url"
 }
 
 function create_release() {
@@ -190,6 +201,8 @@ function create_release() {
   local artifacts=(
     bun-darwin-aarch64.zip
     bun-darwin-aarch64-profile.zip
+    bun-darwin-x64.zip
+    bun-darwin-x64-profile.zip
     bun-linux-aarch64.zip
     bun-linux-aarch64-profile.zip
     bun-linux-x64.zip
@@ -227,7 +240,7 @@ function create_release() {
 
   update_github_release "$tag"
   create_sentry_release "$tag"
-  send_bench_webhook "$tag"
+  send_discord_announcement "$tag"
 }
 
 function assert_canary() {

.clangd

@@ -6,6 +6,3 @@ CompileFlags:
 
 Diagnostics:
   UnusedIncludes: None
-
-HeaderInsertion:
-  IncludeBlocks: Preserve # Do not auto-include headers.

.cursor/rules/building-bun.mdc

@@ -0,0 +1,27 @@
+---
+description: How to build Bun
+globs: 
+---
+# How to build Bun
+
+## CMake
+
+Bun is built using CMake, which you can find in `CMakeLists.txt` and in the `cmake/` directory.
+
+* `CMakeLists.txt`
+* `cmake/`
+  * `Globals.cmake` - macros and functions used by all the other files
+  * `Options.cmake` - build options for configuring the build (e.g. debug/release mode)
+  * `CompilerFlags.cmake` - compiler and linker flags used by all the targets
+  * `tools/` - setup scripts for various build tools (e.g. llvm, zig, webkit, rust, etc.)
+  * `targets/` - targets for bun and its dependencies (e.g. brotli, boringssl, libuv, etc.)
+
+## How to
+
+There are `package.json` scripts that make it easy to build Bun without calling CMake directly, for example:
+
+```sh
+bun run build # builds a debug build: `build/debug/bun-debug`
+bun run build:release # builds a release build: `build/release/bun`
+bun run build:assert # builds a release build with debug assertions: `build/assert/bun`
+```

.cursor/rules/dev-server-tests.mdc

@@ -0,0 +1,139 @@
+---
+description: Writing HMR/Dev Server tests
+globs: test/bake/*
+---
+
+# Writing HMR/Dev Server tests
+
+Dev server tests validate that hot-reloading is robust, correct, and reliable. Remember to write thorough, yet concise tests.
+
+## File Structure
+
+- `test/bake/bake-harness.ts` - shared utilities and test harness
+  - primary test functions `devTest` / `prodTest` / `devAndProductionTest`
+  - class `Dev` (controls subprocess for dev server)
+  - class `Client` (controls a happy-dom subprocess for having the page open)
+  - more helpers
+- `test/bake/client-fixture.mjs` - subprocess for what `Client` controls. it loads a page and uses IPC to query parts of the page, run javascript, and much more.
+- `test/bake/dev/*.test.ts` - these call `devTest` to test dev server and hot reloading
+- `test/bake/dev-and-prod.ts` - these use `devAndProductionTest` to run the same test on dev and production mode. these tests cannot really test hot reloading for obvious reasons.
+
+## Categories
+
+bundle.test.ts - Bundle tests are tests concerning bundling bugs that only occur in DevServer.
+css.test.ts - CSS tests concern bundling bugs with CSS files
+plugins.test.ts - Plugin tests concern plugins in development mode.
+ecosystem.test.ts - These tests involve ensuring certain libraries are correct. It is preferred to test more concrete bugs than testing entire packages.
+esm.test.ts - ESM tests are about various esm features in development mode.
+html.test.ts - HTML tests are tests relating to HTML files themselves.
+react-spa.test.ts - Tests relating to React, our react-refresh transform, and basic server component transforms.
+sourcemap.test.ts - Tests verifying source-maps are correct.
+
+## `devTest` Basics
+
+A test takes in two primary inputs: `files` and `async test(dev) {`
+
+```ts
+import { devTest, emptyHtmlFile } from "../bake-harness";
+
+devTest("html file is watched", {
+  files: {
+    "index.html": emptyHtmlFile({
+      scripts: ["/script.ts"],
+      body: "<h1>Hello</h1>",
+    }),
+    "script.ts": `
+      console.log("hello");
+    `,
+  },
+  async test(dev) {
+    await dev.fetch("/").expect.toInclude("<h1>Hello</h1>");
+    await dev.fetch("/").expect.toInclude("<h1>Hello</h1>");
+    await dev.patch("index.html", {
+      find: "Hello",
+      replace: "World",
+    });
+    await dev.fetch("/").expect.toInclude("<h1>World</h1>");
+
+    // Works
+    await using c = await dev.client("/");
+    await c.expectMessage("hello");
+
+    // Editing HTML reloads
+    await c.expectReload(async () => {
+      await dev.patch("index.html", {
+        find: "World",
+        replace: "Hello",
+      });
+      await dev.fetch("/").expect.toInclude("<h1>Hello</h1>");
+    });
+    await c.expectMessage("hello");
+
+    await c.expectReload(async () => {
+      await dev.patch("index.html", {
+        find: "Hello",
+        replace: "Bar",
+      });
+      await dev.fetch("/").expect.toInclude("<h1>Bar</h1>");
+    });
+    await c.expectMessage("hello");
+
+    await c.expectReload(async () => {
+      await dev.patch("script.ts", {
+        find: "hello",
+        replace: "world",
+      });
+    });
+    await c.expectMessage("world");
+  },
+});
+```
+
+`files` holds the initial state, and the callback runs with the server running. `dev.fetch()` runs HTTP requests, while `dev.client()` opens a browser instance to the code.
+
+Functions `dev.write` and `dev.patch` and `dev.delete` mutate the filesystem. Do not use `node:fs` APIs, as the dev server ones are hooked to wait for hot-reload, and all connected clients to recieve changes.
+
+When a change performs a hard-reload, that must be explicitly annotated with `expectReload`. This tells `client-fixture.mjs` that the test is meant to reload the page once; All other hard reloads automatically fail the test.
+
+Client's have `console.log` instrumented, so that any unasserted logs fail the test. This makes it more obvious when an extra reload or re-evaluation. Messages are awaited via `c.expectMessage("log")` or with multiple arguments if there are multiple logs.
+
+## Testing for bundling errors
+
+By default, a client opening a page to an error will fail the test. This makes testing errors explicit.
+
+```ts
+devTest("import then create", {
+  files: {
+    "index.html": `
+      <!DOCTYPE html>
+      <html>
+      <head></head>
+      <body>
+        <script type="module" src="/script.ts"></script>
+      </body>
+      </html>
+    `,
+    "script.ts": `
+      import data from "./data";
+      console.log(data);
+    `,
+  },
+  async test(dev) {
+    const c = await dev.client("/", {
+      errors: ['script.ts:1:18: error: Could not resolve: "./data"'],
+    });
+    await c.expectReload(async () => {
+      await dev.write("data.ts", "export default 'data';");
+    });
+    await c.expectMessage("data");
+  },
+});
+```
+
+Many functions take an options value to allow specifying it will produce errors. For example, this delete is going to cause a resolution failure.
+
+```ts
+await dev.delete("other.ts", {
+  errors: ['index.ts:1:16: error: Could not resolve: "./other"'],
+});
+```

.cursor/rules/javascriptcore-class.mdc

@@ -0,0 +1,414 @@
+---
+description: JavaScript class implemented in C++
+globs: *.cpp
+alwaysApply: false
+---
+
+# Implementing JavaScript classes in C++
+
+If there is a publicly accessible Constructor and Prototype, then there are 3 classes:
+
+- IF there are C++ class members we need a destructor, so `class Foo : public JSC::DestructibleObject`, if no C++ class fields (only JS properties) then we don't need a class at all usually. We can instead use JSC::constructEmptyObject(vm, structure) and `putDirectOffset` like in [NodeFSStatBinding.cpp](mdc:src/bun.js/bindings/NodeFSStatBinding.cpp).
+- class FooPrototype : public JSC::JSNonFinalObject
+- class FooConstructor : public JSC::InternalFunction
+
+If there is no publicly accessible Constructor, just the Prototype and the class is necessary. In some cases, we can avoid the prototype entirely (but that's rare).
+
+If there are C++ fields on the Foo class, the Foo class will need an iso subspace added to [DOMClientIsoSubspaces.h](mdc:src/bun.js/bindings/webcore/DOMClientIsoSubspaces.h) and [DOMIsoSubspaces.h](mdc:src/bun.js/bindings/webcore/DOMIsoSubspaces.h). Prototype and Constructor do not need subspaces.
+
+Usually you'll need to #include "root.h" at the top of C++ files or you'll get lint errors.
+
+Generally, defining the subspace looks like this:
+
+```c++
+
+class Foo : public JSC::DestructibleObject {
+
+// ...
+
+ template<typename MyClassT, JSC::SubspaceAccess mode>
+    static JSC::GCClient::IsoSubspace* subspaceFor(JSC::VM& vm)
+    {
+        if constexpr (mode == JSC::SubspaceAccess::Concurrently)
+            return nullptr;
+        return WebCore::subspaceForImpl<MyClassT, WebCore::UseCustomHeapCellType::No>(
+            vm,
+            [](auto& spaces) { return spaces.m_clientSubspaceFor${MyClassT}.get(); },
+            [](auto& spaces, auto&& space) { spaces.m_clientSubspaceFor${MyClassT} = std::forward<decltype(space)>(space); },
+            [](auto& spaces) { return spaces.m_subspaceFo${MyClassT}.get(); },
+            [](auto& spaces, auto&& space) { spaces.m_subspaceFor${MyClassT} = std::forward<decltype(space)>(space); });
+    }
+
+
+```
+
+It's better to put it in the .cpp file instead of the .h file, when possible.
+
+## Defining properties
+
+Define properties on the prototype. Use a const HashTableValues like this:
+
+```C++
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncCheckEmail);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncCheckHost);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncCheckIP);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncCheckIssued);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncCheckPrivateKey);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncToJSON);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncToLegacyObject);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncToString);
+static JSC_DECLARE_HOST_FUNCTION(jsX509CertificateProtoFuncVerify);
+
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_ca);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_fingerprint);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_fingerprint256);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_fingerprint512);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_subject);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_subjectAltName);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_infoAccess);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_keyUsage);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_issuer);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_issuerCertificate);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_publicKey);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_raw);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_serialNumber);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_validFrom);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_validTo);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_validFromDate);
+static JSC_DECLARE_CUSTOM_GETTER(jsX509CertificateGetter_validToDate);
+
+static const HashTableValue JSX509CertificatePrototypeTableValues[] = {
+    { "ca"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_ca, 0 } },
+    { "checkEmail"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncCheckEmail, 2 } },
+    { "checkHost"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncCheckHost, 2 } },
+    { "checkIP"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncCheckIP, 1 } },
+    { "checkIssued"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncCheckIssued, 1 } },
+    { "checkPrivateKey"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncCheckPrivateKey, 1 } },
+    { "fingerprint"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_fingerprint, 0 } },
+    { "fingerprint256"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_fingerprint256, 0 } },
+    { "fingerprint512"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_fingerprint512, 0 } },
+    { "infoAccess"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_infoAccess, 0 } },
+    { "issuer"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_issuer, 0 } },
+    { "issuerCertificate"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_issuerCertificate, 0 } },
+    { "keyUsage"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_keyUsage, 0 } },
+    { "publicKey"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_publicKey, 0 } },
+    { "raw"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_raw, 0 } },
+    { "serialNumber"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_serialNumber, 0 } },
+    { "subject"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_subject, 0 } },
+    { "subjectAltName"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_subjectAltName, 0 } },
+    { "toJSON"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncToJSON, 0 } },
+    { "toLegacyObject"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncToLegacyObject, 0 } },
+    { "toString"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncToString, 0 } },
+    { "validFrom"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_validFrom, 0 } },
+    { "validFromDate"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessorOrValue), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_validFromDate, 0 } },
+    { "validTo"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessor), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_validTo, 0 } },
+    { "validToDate"_s, static_cast<unsigned>(PropertyAttribute::ReadOnly | PropertyAttribute::CustomAccessorOrValue), NoIntrinsic, { HashTableValue::GetterSetterType, jsX509CertificateGetter_validToDate, 0 } },
+    { "verify"_s, static_cast<unsigned>(PropertyAttribute::Function), NoIntrinsic, { HashTableValue::NativeFunctionType, jsX509CertificateProtoFuncVerify, 1 } },
+};
+```
+
+### Creating a prototype class
+
+Follow a pattern like this:
+
+```c++
+class JSX509CertificatePrototype final : public JSC::JSNonFinalObject {
+public:
+    using Base = JSC::JSNonFinalObject;
+    static constexpr unsigned StructureFlags = Base::StructureFlags;
+
+    static JSX509CertificatePrototype* create(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::Structure* structure)
+    {
+        JSX509CertificatePrototype* prototype = new (NotNull, allocateCell<JSX509CertificatePrototype>(vm)) JSX509CertificatePrototype(vm, structure);
+        prototype->finishCreation(vm);
+        return prototype;
+    }
+
+    template<typename, JSC::SubspaceAccess>
+    static JSC::GCClient::IsoSubspace* subspaceFor(JSC::VM& vm)
+    {
+        return &vm.plainObjectSpace();
+    }
+
+    DECLARE_INFO;
+
+    static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
+    {
+        auto* structure = JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
+        structure->setMayBePrototype(true);
+        return structure;
+    }
+
+private:
+    JSX509CertificatePrototype(JSC::VM& vm, JSC::Structure* structure)
+        : Base(vm, structure)
+    {
+    }
+
+    void finishCreation(JSC::VM& vm);
+};
+
+const ClassInfo JSX509CertificatePrototype::s_info = { "X509Certificate"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSX509CertificatePrototype) };
+
+void JSX509CertificatePrototype::finishCreation(VM& vm)
+{
+    Base::finishCreation(vm);
+    reifyStaticProperties(vm, JSX509Certificate::info(), JSX509CertificatePrototypeTableValues, *this);
+    JSC_TO_STRING_TAG_WITHOUT_TRANSITION();
+}
+
+} // namespace Bun
+```
+
+### Getter definition:
+
+```C++
+
+JSC_DEFINE_CUSTOM_GETTER(jsX509CertificateGetter_ca, (JSGlobalObject * globalObject, EncodedJSValue thisValue, PropertyName))
+{
+    VM& vm = globalObject->vm();
+    auto scope = DECLARE_THROW_SCOPE(vm);
+
+    JSX509Certificate* thisObject = jsDynamicCast<JSX509Certificate*>(JSValue::decode(thisValue));
+    if (UNLIKELY(!thisObject)) {
+        Bun::throwThisTypeError(*globalObject, scope, "JSX509Certificate"_s, "ca"_s);
+        return {};
+    }
+
+    return JSValue::encode(jsBoolean(thisObject->view().isCA()));
+}
+```
+
+### Setter definition
+
+```C++
+JSC_DEFINE_CUSTOM_SETTER(jsImportMetaObjectSetter_require, (JSGlobalObject * jsGlobalObject, JSC::EncodedJSValue thisValue, JSC::EncodedJSValue encodedValue, PropertyName propertyName))
+{
+    ImportMetaObject* thisObject = jsDynamicCast<ImportMetaObject*>(JSValue::decode(thisValue));
+    if (UNLIKELY(!thisObject))
+        return false;
+
+    JSValue value = JSValue::decode(encodedValue);
+    if (!value.isCell()) {
+        // TODO:
+        return true;
+    }
+
+    thisObject->requireProperty.set(thisObject->vm(), thisObject, value.asCell());
+    return true;
+}
+```
+
+### Function definition
+
+```C++
+JSC_DEFINE_HOST_FUNCTION(jsX509CertificateProtoFuncToJSON, (JSGlobalObject * globalObject, CallFrame* callFrame))
+{
+    VM& vm = globalObject->vm();
+    auto scope = DECLARE_THROW_SCOPE(vm);
+    auto *thisObject = jsDynamicCast<MyClassT*>(callFrame->thisValue());
+     if (UNLIKELY(!thisObject)) {
+        Bun::throwThisTypeError(*globalObject, scope, "MyClass"_s, "myFunctionName"_s);
+        return {};
+    }
+
+    return JSValue::encode(functionThatReturnsJSValue(vm, globalObject, thisObject));
+}
+```
+
+### Constructor definition
+
+```C++
+
+JSC_DECLARE_HOST_FUNCTION(callStats);
+JSC_DECLARE_HOST_FUNCTION(constructStats);
+
+class JSStatsConstructor final : public JSC::InternalFunction {
+public:
+    using Base = JSC::InternalFunction;
+    static constexpr unsigned StructureFlags = Base::StructureFlags;
+
+    static JSStatsConstructor* create(JSC::VM& vm, JSC::Structure* structure, JSC::JSObject* prototype)
+    {
+        JSStatsConstructor* constructor = new (NotNull, JSC::allocateCell<JSStatsConstructor>(vm)) JSStatsConstructor(vm, structure);
+        constructor->finishCreation(vm, prototype);
+        return constructor;
+    }
+
+    DECLARE_INFO;
+
+    template<typename CellType, JSC::SubspaceAccess>
+    static JSC::GCClient::IsoSubspace* subspaceFor(JSC::VM& vm)
+    {
+        return &vm.internalFunctionSpace();
+    }
+
+    static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
+    {
+        return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::InternalFunctionType, StructureFlags), info());
+    }
+
+private:
+    JSStatsConstructor(JSC::VM& vm, JSC::Structure* structure)
+        : Base(vm, structure, callStats, constructStats)
+    {
+    }
+
+    void finishCreation(JSC::VM& vm, JSC::JSObject* prototype)
+    {
+        Base::finishCreation(vm, 0, "Stats"_s);
+        putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, JSC::PropertyAttribute::DontEnum | JSC::PropertyAttribute::DontDelete | JSC::PropertyAttribute::ReadOnly);
+    }
+};
+```
+
+### Structure caching
+
+If there's a class, prototype, and constructor:
+
+1. Add the `JSC::LazyClassStructure` to [ZigGlobalObject.h](mdc:src/bun.js/bindings/ZigGlobalObject.h)
+2. Initialize the class structure in [ZigGlobalObject.cpp](mdc:src/bun.js/bindings/ZigGlobalObject.cpp) in `void GlobalObject::finishCreation(VM& vm)`
+3. Visit the class structure in visitChildren in [ZigGlobalObject.cpp](mdc:src/bun.js/bindings/ZigGlobalObject.cpp) in `void GlobalObject::visitChildrenImpl`
+
+```c++#ZigGlobalObject.cpp
+void GlobalObject::finishCreation(VM& vm) {
+// ...
+    m_JSStatsBigIntClassStructure.initLater(
+        [](LazyClassStructure::Initializer& init) {
+            // Call the function to initialize our class structure.
+            Bun::initJSBigIntStatsClassStructure(init);
+        });
+```
+
+Then, implement the function that creates the structure:
+
+```c++
+void setupX509CertificateClassStructure(LazyClassStructure::Initializer& init)
+{
+    auto* prototypeStructure = JSX509CertificatePrototype::createStructure(init.vm, init.global, init.global->objectPrototype());
+    auto* prototype = JSX509CertificatePrototype::create(init.vm, init.global, prototypeStructure);
+
+    auto* constructorStructure = JSX509CertificateConstructor::createStructure(init.vm, init.global, init.global->functionPrototype());
+
+    auto* constructor = JSX509CertificateConstructor::create(init.vm, init.global, constructorStructure, prototype);
+
+    auto* structure = JSX509Certificate::createStructure(init.vm, init.global, prototype);
+    init.setPrototype(prototype);
+    init.setStructure(structure);
+    init.setConstructor(constructor);
+}
+```
+
+If there's only a class, use `JSC::LazyProperty<JSGlobalObject, Structure>` instead of `JSC::LazyClassStructure`:
+
+1. Add the `JSC::LazyProperty<JSGlobalObject, Structure>` to @ZigGlobalObject.h
+2. Initialize the class structure in @ZigGlobalObject.cpp in `void GlobalObject::finishCreation(VM& vm)`
+3. Visit the lazy property in visitChildren in @ZigGlobalObject.cpp in `void GlobalObject::visitChildrenImpl`
+   void GlobalObject::finishCreation(VM& vm) {
+   // ...
+   this.m_myLazyProperty.initLater([](const JSC::LazyProperty<JSC::JSGlobalObject, JSC::Structure>::Initializer& init) {
+   init.set(Bun::initMyStructure(init.vm, reinterpret_cast<Zig::GlobalObject\*>(init.owner)));
+   });
+
+```
+
+Then, implement the function that creates the structure:
+```c++
+Structure* setupX509CertificateStructure(JSC::VM &vm, Zig::GlobalObject* globalObject)
+{
+    // If there is a prototype:
+    auto* prototypeStructure = JSX509CertificatePrototype::createStructure(init.vm, init.global, init.global->objectPrototype());
+    auto* prototype = JSX509CertificatePrototype::create(init.vm, init.global, prototypeStructure);
+
+    // If there is no prototype or it only has
+
+    auto* structure = JSX509Certificate::createStructure(init.vm, init.global, prototype);
+    init.setPrototype(prototype);
+    init.setStructure(structure);
+    init.setConstructor(constructor);
+}
+```
+
+Then, use the structure by calling `globalObject.m_myStructureName.get(globalObject)`
+
+```C++
+JSC_DEFINE_HOST_FUNCTION(x509CertificateConstructorConstruct, (JSGlobalObject * globalObject, CallFrame* callFrame))
+{
+    VM& vm = globalObject->vm();
+    auto scope = DECLARE_THROW_SCOPE(vm);
+
+    if (!callFrame->argumentCount()) {
+        Bun::throwError(globalObject, scope, ErrorCode::ERR_MISSING_ARGS, "X509Certificate constructor requires at least one argument"_s);
+        return {};
+    }
+
+    JSValue arg = callFrame->uncheckedArgument(0);
+    if (!arg.isCell()) {
+        Bun::throwError(globalObject, scope, ErrorCode::ERR_INVALID_ARG_TYPE, "X509Certificate constructor argument must be a Buffer, TypedArray, or string"_s);
+        return {};
+    }
+
+    auto* zigGlobalObject = defaultGlobalObject(globalObject);
+    Structure* structure = zigGlobalObject->m_JSX509CertificateClassStructure.get(zigGlobalObject);
+    JSValue newTarget = callFrame->newTarget();
+    if (UNLIKELY(zigGlobalObject->m_JSX509CertificateClassStructure.constructor(zigGlobalObject) != newTarget)) {
+        auto scope = DECLARE_THROW_SCOPE(vm);
+        if (!newTarget) {
+            throwTypeError(globalObject, scope, "Class constructor X509Certificate cannot be invoked without 'new'"_s);
+            return {};
+        }
+
+        auto* functionGlobalObject = defaultGlobalObject(getFunctionRealm(globalObject, newTarget.getObject()));
+        RETURN_IF_EXCEPTION(scope, {});
+        structure = InternalFunction::createSubclassStructure(
+            globalObject, newTarget.getObject(), functionGlobalObject->NodeVMScriptStructure());
+        scope.release();
+    }
+
+    return JSValue::encode(createX509Certificate(vm, globalObject, structure, arg));
+}
+```
+
+### Expose to Zig
+
+To expose the constructor to zig:
+
+```c++
+extern "C" JSC::EncodedJSValue Bun__JSBigIntStatsObjectConstructor(Zig::GlobalObject* globalobject)
+{
+    return JSValue::encode(globalobject->m_JSStatsBigIntClassStructure.constructor(globalobject));
+}
+```
+
+Zig:
+
+```zig
+extern "c" fn Bun__JSBigIntStatsObjectConstructor(*JSC.JSGlobalObject) JSC.JSValue;
+pub const getBigIntStatsConstructor =  Bun__JSBigIntStatsObjectConstructor;
+```
+
+To create an object (instance) of a JS class defined in C++ from Zig, follow the \_\_toJS convention like this:
+
+```c++
+// X509* is whatever we need to create the object
+extern "C" EncodedJSValue Bun__X509__toJS(Zig::GlobalObject* globalObject, X509* cert)
+{
+    // ... implementation details
+    auto* structure = globalObject->m_JSX509CertificateClassStructure.get(globalObject);
+    return JSValue::encode(JSX509Certificate::create(globalObject->vm(), structure, globalObject, WTFMove(cert)));
+}
+```
+
+And from Zig:
+
+```zig
+const X509 = opaque {
+    // ... class
+
+    extern fn Bun__X509__toJS(*JSC.JSGlobalObject, *X509) JSC.JSValue;
+
+    pub fn toJS(this: *X509, globalObject: *JSC.JSGlobalObject) JSC.JSValue {
+        return Bun__X509__toJS(globalObject, this);
+    }
+};
+```

.cursor/rules/writing-tests.mdc

@@ -0,0 +1,91 @@
+---
+description: Writing tests for Bun
+globs: 
+---
+# Writing tests for Bun
+
+## Where tests are found
+
+You'll find all of Bun's tests in the `test/` directory.
+
+* `test/`
+  * `cli/` - CLI command tests, like `bun install` or `bun init`
+  * `js/` - JavaScript & TypeScript tests
+    * `bun/` - `Bun` APIs tests, seperated by category, for example: `glob/` for `Bun.Glob` tests
+    * `node/` - Node.js module tests, seperated by module, for example: `assert/` for `node:assert` tests
+      * `test/` - Vendored Node.js tests, taken from the Node.js repository (does not conform to Bun's test style)
+    * `web/` - Web API tests, seperated by category, for example: `fetch/` for `Request` and `Response` tests
+    * `third_party/` - npm package tests, to validate that basic usage works in Bun
+  * `napi/` - N-API tests
+  * `v8/` - V8 C++ API tests
+  * `bundler/` - Bundler, transpiler, CSS, and `bun build` tests
+  * `regression/issue/[number]` - Regression tests, always make one when fixing a particular issue
+
+## How tests are written
+
+Bun's tests are written as JavaScript and TypeScript files with the Jest-style APIs, like `test`, `describe`, and `expect`. They are tested using Bun's own test runner, `bun test`. 
+
+```js
+import { describe, test, expect } from "bun:test";
+import assert, { AssertionError } from "assert";
+
+describe("assert(expr)", () => {
+  test.each([true, 1, "foo"])(`assert(%p) does not throw`, expr => {
+    expect(() => assert(expr)).not.toThrow();
+  });
+
+  test.each([false, 0, "", null, undefined])(`assert(%p) throws`, expr => {
+    expect(() => assert(expr)).toThrow(AssertionError);
+  });
+});
+```
+
+## Testing conventions
+
+* See `test/harness.ts` for common test utilities and helpers
+* Be rigorous and test for edge-cases and unexpected inputs
+* Use data-driven tests, e.g. `test.each`, to reduce boilerplate when possible
+* When you need to test Bun as a CLI, use the following pattern:
+
+```js
+import { test, expect } from "bun:test";
+import { spawn } from "bun";
+import { bunExe, bunEnv } from "harness";
+
+test("bun --version", async () => {
+  const { exited, stdout: stdoutStream, stderr: stderrStream } = spawn({
+    cmd: [bunExe(), "--version"],
+    env: bunEnv,
+    stdout: "pipe",
+    stderr: "pipe",
+  });
+  const [ exitCode, stdout, stderr ] = await Promise.all([
+    exited,
+    new Response(stdoutStream).text(),
+    new Response(stderrStream).text(),
+  ]);
+  expect({ exitCode, stdout, stderr }).toMatchObject({
+    exitCode: 0,
+    stdout: expect.stringContaining(Bun.version),
+    stderr: "",
+  });
+});
+```
+
+## Before writing a test
+
+* If you are fixing a bug, write the test first and make sure it fails (as expected) with the canary version of Bun
+* If you are fixing a Node.js compatibility bug, create a throw-away snippet of code and test that it works as you expect in Node.js, then that it fails (as expected) with the canary version of Bun
+* When the expected behaviour is ambigious, defer to matching what happens in Node.js
+* Always attempt to find related tests in an existing test file before creating a new test file
+
+
+
+
+
+
+
+
+
+
+

.cursor/rules/zig-javascriptcore-classes.mdc

@@ -0,0 +1,498 @@
+---
+description: How Zig works with JavaScriptCore bindings generator
+globs: 
+alwaysApply: false
+---
+# Bun's JavaScriptCore Class Bindings Generator
+
+This document explains how Bun's class bindings generator works to bridge Zig and JavaScript code through JavaScriptCore (JSC).
+
+## Architecture Overview
+
+Bun's binding system creates a seamless bridge between JavaScript and Zig, allowing Zig implementations to be exposed as JavaScript classes. The system has several key components:
+
+1. **Zig Implementation** (.zig files)
+2. **JavaScript Interface Definition** (.classes.ts files)
+3. **Generated Code** (C++/Zig files that connect everything)
+
+## Class Definition Files
+
+### JavaScript Interface (.classes.ts)
+
+The `.classes.ts` files define the JavaScript API using a declarative approach:
+
+```typescript
+// Example: encoding.classes.ts
+define({
+  name: "TextDecoder", 
+  constructor: true,
+  JSType: "object",
+  finalize: true,
+  proto: {
+    decode: {
+      // Function definition
+      args: 1,
+    },
+    encoding: {
+      // Getter with caching
+      getter: true,
+      cache: true,
+    },
+    fatal: {
+      // Read-only property
+      getter: true, 
+    },
+    ignoreBOM: {
+      // Read-only property
+      getter: true,
+    }
+  }
+});
+```
+
+Each class definition specifies:
+- The class name
+- Whether it has a constructor
+- JavaScript type (object, function, etc.)
+- Properties and methods in the `proto` field
+- Caching strategy for properties
+- Finalization requirements
+
+### Zig Implementation (.zig)
+
+The Zig files implement the native functionality:
+
+```zig
+// Example: TextDecoder.zig
+pub const TextDecoder = struct {
+    // Expose generated bindings as `js` namespace with trait conversion methods
+    pub const js = JSC.Codegen.JSTextDecoder;
+    pub const toJS = js.toJS;
+    pub const fromJS = js.fromJS;
+    pub const fromJSDirect = js.fromJSDirect;
+
+    // Internal state
+    encoding: []const u8,
+    fatal: bool,
+    ignoreBOM: bool,
+
+    // Constructor implementation - note use of globalObject
+    pub fn constructor(
+        globalObject: *JSGlobalObject,
+        callFrame: *JSC.CallFrame,
+    ) bun.JSError!*TextDecoder {
+        // Implementation
+
+        return bun.new(TextDecoder, .{
+            // Fields
+        });
+    }
+    
+    // Prototype methods - note return type includes JSError
+    pub fn decode(
+        this: *TextDecoder,
+        globalObject: *JSGlobalObject,
+        callFrame: *JSC.CallFrame,
+    ) bun.JSError!JSC.JSValue {
+        // Implementation
+    }
+    
+    // Getters
+    pub fn getEncoding(this: *TextDecoder, globalObject: *JSGlobalObject) JSC.JSValue {
+        return JSC.JSValue.createStringFromUTF8(globalObject, this.encoding);
+    }
+    
+    pub fn getFatal(this: *TextDecoder, globalObject: *JSGlobalObject) JSC.JSValue {
+        return JSC.JSValue.jsBoolean(this.fatal);
+    }
+    
+    // Cleanup - note standard pattern of using deinit/deref
+    fn deinit(this: *TextDecoder) void {
+        // Release any retained resources
+        // Free the pointer at the end.
+        bun.destroy(this);
+    }
+    
+    // Finalize - called by JS garbage collector. This should call deinit, or deref if reference counted.
+    pub fn finalize(this: *TextDecoder) void {
+        this.deinit();
+    }
+};
+```
+
+Key components in the Zig file:
+- The struct containing native state
+- `pub const js = JSC.Codegen.JS<ClassName>` to include generated code
+- Constructor and methods using `bun.JSError!JSValue` return type for proper error handling
+- Consistent use of `globalObject` parameter name instead of `ctx`
+- Methods matching the JavaScript interface
+- Getters/setters for properties
+- Proper resource cleanup pattern with `deinit()` and `finalize()`
+
+## Code Generation System
+
+The binding generator produces C++ code that connects JavaScript and Zig:
+
+1. **JSC Class Structure**: Creates C++ classes for the JS object, prototype, and constructor
+2. **Memory Management**: Handles GC integration through JSC's WriteBarrier
+3. **Method Binding**: Connects JS function calls to Zig implementations
+4. **Type Conversion**: Converts between JS values and Zig types
+5. **Property Caching**: Implements the caching system for properties
+
+The generated C++ code includes:
+- A JSC wrapper class (`JSTextDecoder`)
+- A prototype class (`JSTextDecoderPrototype`)
+- A constructor function (`JSTextDecoderConstructor`)
+- Function bindings (`TextDecoderPrototype__decodeCallback`)
+- Property getters/setters (`TextDecoderPrototype__encodingGetterWrap`)
+
+## CallFrame Access
+
+The `CallFrame` object provides access to JavaScript execution context:
+
+```zig
+pub fn decode(
+    this: *TextDecoder, 
+    globalObject: *JSGlobalObject,
+    callFrame: *JSC.CallFrame
+) bun.JSError!JSC.JSValue {
+    // Get arguments
+    const input = callFrame.argument(0);
+    const options = callFrame.argument(1);
+    
+    // Get this value
+    const thisValue = callFrame.thisValue();
+    
+    // Implementation with error handling
+    if (input.isUndefinedOrNull()) {
+        return globalObject.throw("Input cannot be null or undefined", .{});
+    }
+    
+    // Return value or throw error
+    return JSC.JSValue.jsString(globalObject, "result");
+}
+```
+
+CallFrame methods include:
+- `argument(i)`: Get the i-th argument
+- `argumentCount()`: Get the number of arguments
+- `thisValue()`: Get the `this` value
+- `callee()`: Get the function being called
+
+## Property Caching and GC-Owned Values
+
+The `cache: true` option in property definitions enables JSC's WriteBarrier to efficiently store values:
+
+```typescript
+encoding: {
+  getter: true,
+  cache: true, // Enable caching
+}
+```
+
+### C++ Implementation
+
+In the generated C++ code, caching uses JSC's WriteBarrier:
+
+```cpp
+JSC_DEFINE_CUSTOM_GETTER(TextDecoderPrototype__encodingGetterWrap, (...)) {
+    auto& vm = JSC::getVM(lexicalGlobalObject);
+    Zig::GlobalObject *globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
+    auto throwScope = DECLARE_THROW_SCOPE(vm);
+    JSTextDecoder* thisObject = jsCast<JSTextDecoder*>(JSValue::decode(encodedThisValue));
+    JSC::EnsureStillAliveScope thisArg = JSC::EnsureStillAliveScope(thisObject);
+    
+    // Check for cached value and return if present
+    if (JSValue cachedValue = thisObject->m_encoding.get())
+        return JSValue::encode(cachedValue);
+    
+    // Get value from Zig implementation
+    JSC::JSValue result = JSC::JSValue::decode(
+        TextDecoderPrototype__getEncoding(thisObject->wrapped(), globalObject)
+    );
+    RETURN_IF_EXCEPTION(throwScope, {});
+    
+    // Store in cache for future access
+    thisObject->m_encoding.set(vm, thisObject, result);
+    RELEASE_AND_RETURN(throwScope, JSValue::encode(result));
+}
+```
+
+### Zig Accessor Functions
+
+For each cached property, the generator creates Zig accessor functions that allow Zig code to work with these GC-owned values:
+
+```zig
+// External function declarations
+extern fn TextDecoderPrototype__encodingSetCachedValue(JSC.JSValue, *JSC.JSGlobalObject, JSC.JSValue) callconv(JSC.conv) void;
+extern fn TextDecoderPrototype__encodingGetCachedValue(JSC.JSValue) callconv(JSC.conv) JSC.JSValue;
+
+/// `TextDecoder.encoding` setter
+/// This value will be visited by the garbage collector.
+pub fn encodingSetCached(thisValue: JSC.JSValue, globalObject: *JSC.JSGlobalObject, value: JSC.JSValue) void {
+    JSC.markBinding(@src());
+    TextDecoderPrototype__encodingSetCachedValue(thisValue, globalObject, value);
+}
+
+/// `TextDecoder.encoding` getter
+/// This value will be visited by the garbage collector.
+pub fn encodingGetCached(thisValue: JSC.JSValue) ?JSC.JSValue {
+    JSC.markBinding(@src());
+    const result = TextDecoderPrototype__encodingGetCachedValue(thisValue);
+    if (result == .zero)
+        return null;
+
+    return result;
+}
+```
+
+### Benefits of GC-Owned Values
+
+This system provides several key benefits:
+
+1. **Automatic Memory Management**: The JavaScriptCore GC tracks and manages these values
+2. **Proper Garbage Collection**: The WriteBarrier ensures values are properly visited during GC
+3. **Consistent Access**: Zig code can easily get/set these cached JS values
+4. **Performance**: Cached values avoid repeated computation or serialization  
+
+### Use Cases
+
+GC-owned cached values are particularly useful for:
+
+1. **Computed Properties**: Store expensive computation results
+2. **Lazily Created Objects**: Create objects only when needed, then cache them
+3. **References to Other Objects**: Store references to other JS objects that need GC tracking
+4. **Memoization**: Cache results based on input parameters
+
+The WriteBarrier mechanism ensures that any JS values stored in this way are properly tracked by the garbage collector.
+
+## Memory Management and Finalization
+
+The binding system handles memory management across the JavaScript/Zig boundary:
+
+1. **Object Creation**: JavaScript `new TextDecoder()` creates both a JS wrapper and a Zig struct
+2. **Reference Tracking**: JSC's GC tracks all JS references to the object
+3. **Finalization**: When the JS object is collected, the finalizer releases Zig resources
+
+Bun uses a consistent pattern for resource cleanup:
+
+```zig
+// Resource cleanup method - separate from finalization
+pub fn deinit(this: *TextDecoder) void {
+    // Release resources like strings
+    this._encoding.deref(); // String deref pattern
+    
+    // Free any buffers
+    if (this.buffer) |buffer| {
+        bun.default_allocator.free(buffer);
+    }
+}
+
+// Called by the GC when object is collected
+pub fn finalize(this: *TextDecoder) void {
+    JSC.markBinding(@src()); // For debugging
+    this.deinit(); // Clean up resources
+    bun.default_allocator.destroy(this); // Free the object itself
+}
+```
+
+Some objects that hold references to other JS objects use `.deref()` instead:
+
+```zig
+pub fn finalize(this: *SocketAddress) void {
+    JSC.markBinding(@src());
+    this._presentation.deref(); // Release references
+    this.destroy();
+}
+```
+
+## Error Handling with JSError
+
+Bun uses `bun.JSError!JSValue` return type for proper error handling:
+
+```zig
+pub fn decode(
+    this: *TextDecoder, 
+    globalObject: *JSGlobalObject,
+    callFrame: *JSC.CallFrame
+) bun.JSError!JSC.JSValue {
+    // Throwing an error
+    if (callFrame.argumentCount() < 1) {
+        return globalObject.throw("Missing required argument", .{});
+    }
+    
+    // Or returning a success value
+    return JSC.JSValue.jsString(globalObject, "Success!");
+}
+```
+
+This pattern allows Zig functions to:
+1. Return JavaScript values on success
+2. Throw JavaScript exceptions on error
+3. Propagate errors automatically through the call stack
+
+## Type Safety and Error Handling
+
+The binding system includes robust error handling:
+
+```cpp
+// Example of type checking in generated code
+JSTextDecoder* thisObject = jsDynamicCast<JSTextDecoder*>(callFrame->thisValue());
+if (UNLIKELY(!thisObject)) {
+    scope.throwException(lexicalGlobalObject, 
+        Bun::createInvalidThisError(lexicalGlobalObject, callFrame->thisValue(), "TextDecoder"_s));
+    return {};
+}
+```
+
+## Prototypal Inheritance
+
+The binding system creates proper JavaScript prototype chains:
+
+1. **Constructor**: JSTextDecoderConstructor with standard .prototype property
+2. **Prototype**: JSTextDecoderPrototype with methods and properties
+3. **Instances**: Each JSTextDecoder instance with __proto__ pointing to prototype
+
+This ensures JavaScript inheritance works as expected:
+
+```cpp
+// From generated code
+void JSTextDecoderConstructor::finishCreation(VM& vm, JSC::JSGlobalObject* globalObject, JSTextDecoderPrototype* prototype)
+{
+    Base::finishCreation(vm, 0, "TextDecoder"_s, PropertyAdditionMode::WithoutStructureTransition);
+    
+    // Set up the prototype chain
+    putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
+    ASSERT(inherits(info()));
+}
+```
+
+## Performance Considerations
+
+The binding system is optimized for performance:
+
+1. **Direct Pointer Access**: JavaScript objects maintain a direct pointer to Zig objects
+2. **Property Caching**: WriteBarrier caching avoids repeated native calls for stable properties 
+3. **Memory Management**: JSC garbage collection integrated with Zig memory management
+4. **Type Conversion**: Fast paths for common JavaScript/Zig type conversions
+
+## Creating a New Class Binding
+
+To create a new class binding in Bun:
+
+1. **Define the class interface** in a `.classes.ts` file:
+   ```typescript
+   define({
+     name: "MyClass",
+     constructor: true,
+     finalize: true,
+     proto: {
+       myMethod: {
+         args: 1,
+       },
+       myProperty: {
+         getter: true,
+         cache: true,
+       }
+     }
+   });
+   ```
+
+2. **Implement the native functionality** in a `.zig` file:
+   ```zig
+   pub const MyClass = struct {
+       // Generated bindings
+       pub const js = JSC.Codegen.JSMyClass;
+       pub const toJS = js.toJS;
+       pub const fromJS = js.fromJS;
+       pub const fromJSDirect = js.fromJSDirect;
+
+       // State
+       value: []const u8,
+       
+       pub const new = bun.TrivialNew(@This());
+       
+       // Constructor
+       pub fn constructor(
+           globalObject: *JSGlobalObject,
+           callFrame: *JSC.CallFrame,
+       ) bun.JSError!*MyClass {
+           const arg = callFrame.argument(0);
+           // Implementation
+       }
+       
+       // Method
+       pub fn myMethod(
+           this: *MyClass,
+           globalObject: *JSGlobalObject,
+           callFrame: *JSC.CallFrame,
+       ) bun.JSError!JSC.JSValue {
+           // Implementation
+       }
+       
+       // Getter
+       pub fn getMyProperty(this: *MyClass, globalObject: *JSGlobalObject) JSC.JSValue {
+           return JSC.JSValue.jsString(globalObject, this.value);
+       }
+       
+       // Resource cleanup
+       pub fn deinit(this: *MyClass) void {
+           // Clean up resources
+       }
+       
+       pub fn finalize(this: *MyClass) void {
+           this.deinit();
+           bun.destroy(this);
+       }
+   };
+   ```
+
+3. **The binding generator** creates all necessary C++ and Zig glue code to connect JavaScript and Zig, including:
+   - C++ class definitions
+   - Method and property bindings
+   - Memory management utilities
+   - GC integration code
+
+## Generated Code Structure
+
+The binding generator produces several components:
+
+### 1. C++ Classes
+
+For each Zig class, the system generates:
+
+- **JS<Class>**: Main wrapper that holds a pointer to the Zig object (`JSTextDecoder`)
+- **JS<Class>Prototype**: Contains methods and properties (`JSTextDecoderPrototype`)
+- **JS<Class>Constructor**: Implementation of the JavaScript constructor (`JSTextDecoderConstructor`)
+
+### 2. C++ Methods and Properties
+
+- **Method Callbacks**: `TextDecoderPrototype__decodeCallback`
+- **Property Getters/Setters**: `TextDecoderPrototype__encodingGetterWrap`
+- **Initialization Functions**: `finishCreation` methods for setting up the class
+
+### 3. Zig Bindings
+
+- **External Function Declarations**:
+  ```zig
+  extern fn TextDecoderPrototype__decode(*TextDecoder, *JSC.JSGlobalObject, *JSC.CallFrame) callconv(JSC.conv) JSC.EncodedJSValue;
+  ```
+
+- **Cached Value Accessors**:
+  ```zig
+  pub fn encodingGetCached(thisValue: JSC.JSValue) ?JSC.JSValue { ... }
+  pub fn encodingSetCached(thisValue: JSC.JSValue, globalObject: *JSC.JSGlobalObject, value: JSC.JSValue) void { ... }
+  ```
+
+- **Constructor Helpers**:
+  ```zig
+  pub fn create(globalObject: *JSC.JSGlobalObject) bun.JSError!JSC.JSValue { ... }
+  ```
+
+### 4. GC Integration
+
+- **Memory Cost Calculation**: `estimatedSize` method
+- **Child Visitor Methods**: `visitChildrenImpl` and `visitAdditionalChildren`
+- **Heap Analysis**: `analyzeHeap` for debugging memory issues
+
+This architecture makes it possible to implement high-performance native functionality in Zig while exposing a clean, idiomatic JavaScript API to users.

.git-blame-ignore-revs

@@ -0,0 +1,8 @@
+# Add commits to ignore in `git blame`. This allows large stylistic refactors to
+# avoid mucking up blames.
+#
+# To configure git to use this, run: 
+#
+#    git config blame.ignoreRevsFile .git-blame-ignore-revs
+#
+4ec410e0d7c5f6a712c323444edbf56b48d432d8 # make @import("bun") work in zig (#19096)

.gitattributes

@@ -15,6 +15,7 @@
 *.lock text eol=lf whitespace=blank-at-eol,-blank-at-eof,-space-before-tab,tab-in-indent,tabwidth=2
 *.map text eol=lf whitespace=blank-at-eol,-blank-at-eof,-space-before-tab,tab-in-indent,tabwidth=2
 *.md text eol=lf whitespace=blank-at-eol,-blank-at-eof,-space-before-tab,tab-in-indent,tabwidth=2
+*.mdc text eol=lf whitespace=blank-at-eol,-blank-at-eof,-space-before-tab,tab-in-indent,tabwidth=2
 *.mjs text eol=lf whitespace=blank-at-eol,-blank-at-eof,-space-before-tab,tab-in-indent,tabwidth=2
 *.mts text eol=lf whitespace=blank-at-eol,-blank-at-eof,-space-before-tab,tab-in-indent,tabwidth=2
 

.github/actions/setup-bun/action.yml

@@ -4,7 +4,7 @@ description: An internal version of the 'oven-sh/setup-bun' action.
 inputs:
   bun-version:
     type: string
-    description: "The version of bun to install: 'latest', 'canary', 'bun-v1.0.0', etc."
+    description: "The version of bun to install: 'latest', 'canary', 'bun-v1.2.0', etc."
     default: latest
     required: false
   baseline:

.github/pull_request_template.md

@@ -28,7 +28,7 @@ This adds a new flag --bail to bun test. When set, it will stop running tests af
 
 - [ ] I checked the lifetime of memory allocated to verify it's (1) freed and (2) only freed when it should be
 - [ ] I included a test for the new code, or an existing test covers it
-- [ ] JSValue used outside outside of the stack is either wrapped in a JSC.Strong or is JSValueProtect'ed
+- [ ] JSValue used outside of the stack is either wrapped in a JSC.Strong or is JSValueProtect'ed
 - [ ] I wrote TypeScript/JavaScript tests and they pass locally (`bun-debug test test-file-name.test`)
 -->
 

.github/workflows/clang-format.yml

@@ -10,9 +10,9 @@ on:
   merge_group:
 
 env:
-  BUN_VERSION: "1.1.44"
-  LLVM_VERSION: "18.1.8"
-  LLVM_VERSION_MAJOR: "18"
+  BUN_VERSION: "1.2.0"
+  LLVM_VERSION: "19.1.7"
+  LLVM_VERSION_MAJOR: "19"
 
 jobs:
   clang-format:

.github/workflows/clang-tidy.yml

@@ -10,9 +10,9 @@ on:
   merge_group:
 
 env:
-  BUN_VERSION: "1.1.44"
-  LLVM_VERSION: "18.1.8"
-  LLVM_VERSION_MAJOR: "18"
+  BUN_VERSION: "1.2.0"
+  LLVM_VERSION: "19.1.7"
+  LLVM_VERSION_MAJOR: "19"
 
 jobs:
   clang-tidy:

.github/workflows/lint.yml

@@ -5,8 +5,7 @@ on:
   workflow_dispatch:
 
 env:
-  BUN_VERSION: "1.1.44"
-  OXLINT_VERSION: "0.15.0"
+  BUN_VERSION: "1.2.10"
 
 jobs:
   lint-js:
@@ -19,4 +18,4 @@ jobs:
         with:
           bun-version: ${{ env.BUN_VERSION }}
       - name: Lint
-        run: bunx oxlint --config oxlint.json --quiet --format github
+        run: bun lint

.github/workflows/packages-ci.yml

@@ -0,0 +1,55 @@
+name: Packages CI
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "packages/**"
+      - .prettierrc
+      - .prettierignore
+      - tsconfig.json
+      - oxlint.json
+      - "!**/*.md"
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "packages/**"
+      - .prettierrc
+      - .prettierignore
+      - tsconfig.json
+      - oxlint.json
+      - "!**/*.md"
+
+env:
+  BUN_VERSION: "canary"
+
+jobs:
+  bun-plugin-svelte:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Bun
+        uses: ./.github/actions/setup-bun
+        with:
+          bun-version: ${{ env.BUN_VERSION }}
+
+      - name: Install dependencies
+        run: |
+          bun install
+          pushd ./packages/bun-plugin-svelte && bun install
+
+      - name: Lint
+        run: |
+          bunx oxlint@0.15 --format github --deny-warnings
+          bunx prettier --config ../../.prettierrc --check .
+        working-directory: ./packages/bun-plugin-svelte
+
+      - name: Check types
+        run: bun check:types
+        working-directory: ./packages/bun-plugin-svelte
+
+      - name: Test
+        run: bun test
+        working-directory: ./packages/bun-plugin-svelte

.github/workflows/prettier-format.yml

@@ -10,7 +10,7 @@ on:
   merge_group:
 
 env:
-  BUN_VERSION: "1.1.44"
+  BUN_VERSION: "1.2.0"
 
 jobs:
   prettier-format:

.github/workflows/release.yml

@@ -44,6 +44,10 @@ on:
         description: Should types be released to npm?
         type: boolean
         default: false
+      use-definitelytyped:
+        description: "Should types be PR'd to DefinitelyTyped?"
+        type: boolean
+        default: false
 
 jobs:
   sign:
@@ -66,7 +70,7 @@ jobs:
       - name: Setup Bun
         uses: ./.github/actions/setup-bun
         with:
-          bun-version: "1.1.44"
+          bun-version: "1.2.3"
       - name: Install Dependencies
         run: bun install
       - name: Sign Release
@@ -94,7 +98,7 @@ jobs:
       - name: Setup Bun
         uses: ./.github/actions/setup-bun
         with:
-          bun-version: "1.1.44"
+          bun-version: "1.2.3"
       - name: Install Dependencies
         run: bun install
       - name: Release
@@ -123,7 +127,7 @@ jobs:
         if: ${{ env.BUN_VERSION != 'canary' }}
         uses: ./.github/actions/setup-bun
         with:
-          bun-version: "1.1.44"
+          bun-version: "1.2.3"
       - name: Setup Bun
         if: ${{ env.BUN_VERSION == 'canary' }}
         uses: ./.github/actions/setup-bun
@@ -155,6 +159,52 @@ jobs:
         with:
           package: packages/bun-types/package.json
           token: ${{ secrets.NPM_TOKEN }}
+  definitelytyped:
+    name: Make pr to DefinitelyTyped to update `bun-types` version
+    runs-on: ubuntu-latest
+    needs: npm-types
+    if: ${{ github.event_name == 'release' || github.event.inputs.use-definitelytyped == 'true' }}
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout (DefinitelyTyped)
+        uses: actions/checkout@v4
+        with:
+          repository: DefinitelyTyped/DefinitelyTyped
+      - name: Checkout (bun)
+        uses: actions/checkout@v4
+        with:
+          path: bun
+      - name: Setup Bun
+        uses: ./bun/.github/actions/setup-bun
+        with:
+          bun-version: "1.2.0"
+      - id: bun-version
+        run: echo "BUN_VERSION=${BUN_VERSION#bun-v}" >> "$GITHUB_OUTPUT"
+      - name: Update bun-types version in package.json
+        run: |
+          bun -e '
+          const file = Bun.file("./types/bun/package.json");
+          const json = await file.json();
+          const version = "${{ steps.bun-version.outputs.BUN_VERSION }}"; 
+          json.dependencies["bun-types"] = version;
+          json.version = version.slice(0, version.lastIndexOf(".")) + ".9999";
+          await file.write(JSON.stringify(json, null, 4) + "\n");
+          '
+      - name: Create Pull Request
+        uses: peter-evans/create-pull-request@v7
+        if: ${{ env.BUN_LATEST == 'true' && env.BUN_VERSION != 'canary'}}
+        with:
+          token: ${{ secrets.ROBOBUN_TOKEN }}
+          add-paths: ./types/bun/package.json
+          title: "[bun] update to ${{ steps.bun-version.outputs.BUN_VERSION }}"
+          commit-message: "[bun] update to ${{ steps.bun-version.outputs.BUN_VERSION }}"
+          body: |
+            Update `bun-types` version to ${{ steps.bun-version.outputs.BUN_VERSION }}
+
+            https://bun.sh/blog/${{ env.BUN_VERSION }}
+          push-to-fork: oven-sh/DefinitelyTyped
+          branch: ${{env.BUN_VERSION}}
   docker:
     name: Release to Dockerhub
     runs-on: ubuntu-latest
@@ -181,7 +231,7 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Setup Docker emulator
-        uses: docker/setup-qemu-action@v2
+        uses: docker/setup-qemu-action@v3
       - id: buildx
         name: Setup Docker buildx
         uses: docker/setup-buildx-action@v3
@@ -189,7 +239,7 @@ jobs:
           platforms: linux/amd64,linux/arm64
       - id: metadata
         name: Setup Docker metadata
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@v5
         with:
           images: oven/bun
           flavor: |
@@ -206,7 +256,7 @@ jobs:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
       - name: Push to Docker
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: ./dockerhub/${{ matrix.dir || matrix.variant }}
           platforms: linux/amd64,linux/arm64
@@ -265,7 +315,7 @@ jobs:
       - name: Setup Bun
         uses: ./.github/actions/setup-bun
         with:
-          bun-version: "1.1.44"
+          bun-version: "1.2.0"
       - name: Install Dependencies
         run: bun install
       - name: Release
@@ -309,7 +359,7 @@ jobs:
         uses: ./.github/actions/setup-bun
         if: ${{ env.BUN_LATEST == 'true' }}
         with:
-          bun-version: "1.1.44"
+          bun-version: "1.2.0"
       - name: Bump version
         uses: ./.github/actions/bump
         if: ${{ env.BUN_LATEST == 'true' }}

.github/workflows/run-lint.yml

@@ -3,8 +3,7 @@ name: Lint
 permissions:
   contents: read
 env:
-  LLVM_VERSION: 16
-  BUN_VERSION: "1.1.44"
+  BUN_VERSION: "1.2.0"
 
 on:
   workflow_call:

.github/workflows/test-bump.yml

@@ -9,7 +9,7 @@ on:
         required: true
 
 env:
-  BUN_VERSION: "1.1.44"
+  BUN_VERSION: "1.2.0"
 
 jobs:
   bump:

.github/workflows/update-cares.yml

@@ -50,11 +50,16 @@ jobs:
             exit 1
           fi
 
-          LATEST_SHA=$(curl -sL "https://api.github.com/repos/c-ares/c-ares/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
-          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+          LATEST_TAG_SHA=$(curl -sL "https://api.github.com/repos/c-ares/c-ares/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
+          if [ -z "$LATEST_TAG_SHA" ] || [ "$LATEST_TAG_SHA" = "null" ]; then
             echo "Error: Could not fetch SHA for tag $LATEST_TAG"
             exit 1
           fi
+          LATEST_SHA=$(curl -sL "https://api.github.com/repos/c-ares/c-ares/git/ref/tags/$LATEST_TAG_SHA" | jq -r '.object.sha')
+          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+            echo "Error: Could not fetch SHA for tag $LATEST_TAG @ $LATEST_TAG_SHA"
+            exit 1
+          fi
 
           if ! [[ $LATEST_SHA =~ ^[0-9a-f]{40}$ ]]; then
             echo "Error: Invalid SHA format received from GitHub"
@@ -89,4 +94,6 @@ jobs:
 
             Updates c-ares to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/c-ares/c-ares/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-cares.yml)

.github/workflows/update-libarchive.yml

@@ -50,11 +50,16 @@ jobs:
             exit 1
           fi
 
-          LATEST_SHA=$(curl -sL "https://api.github.com/repos/libarchive/libarchive/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
-          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+          LATEST_TAG_SHA=$(curl -sL "https://api.github.com/repos/libarchive/libarchive/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
+          if [ -z "$LATEST_TAG_SHA" ] || [ "$LATEST_TAG_SHA" = "null" ]; then
             echo "Error: Could not fetch SHA for tag $LATEST_TAG"
             exit 1
           fi
+          LATEST_SHA=$(curl -sL "https://api.github.com/repos/libarchive/libarchive/git/tags/$LATEST_TAG_SHA" | jq -r '.object.sha')
+          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+            echo "Error: Could not fetch SHA for tag $LATEST_TAG @ $LATEST_TAG_SHA"
+            exit 1
+          fi
 
           if ! [[ $LATEST_SHA =~ ^[0-9a-f]{40}$ ]]; then
             echo "Error: Invalid SHA format received from GitHub"
@@ -89,4 +94,6 @@ jobs:
 
             Updates libarchive to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/libarchive/libarchive/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-libarchive.yml)

.github/workflows/update-libdeflate.yml

@@ -50,11 +50,16 @@ jobs:
             exit 1
           fi
 
-          LATEST_SHA=$(curl -sL "https://api.github.com/repos/ebiggers/libdeflate/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
-          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+          LATEST_TAG_SHA=$(curl -sL "https://api.github.com/repos/ebiggers/libdeflate/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
+          if [ -z "$LATEST_TAG_SHA" ] || [ "$LATEST_TAG_SHA" = "null" ]; then
             echo "Error: Could not fetch SHA for tag $LATEST_TAG"
             exit 1
           fi
+          LATEST_SHA=$(curl -sL "https://api.github.com/repos/ebiggers/libdeflate/git/tags/$LATEST_TAG_SHA" | jq -r '.object.sha')
+          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+            echo "Error: Could not fetch SHA for tag $LATEST_TAG @ $LATEST_TAG_SHA"
+            exit 1
+          fi
 
           if ! [[ $LATEST_SHA =~ ^[0-9a-f]{40}$ ]]; then
             echo "Error: Invalid SHA format received from GitHub"
@@ -89,4 +94,6 @@ jobs:
 
             Updates libdeflate to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/ebiggers/libdeflate/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-libdeflate.yml)

.github/workflows/update-lolhtml.yml

@@ -50,11 +50,16 @@ jobs:
             exit 1
           fi
 
-          LATEST_SHA=$(curl -sL "https://api.github.com/repos/cloudflare/lol-html/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
-          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+          LATEST_TAG_SHA=$(curl -sL "https://api.github.com/repos/cloudflare/lol-html/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
+          if [ -z "$LATEST_TAG_SHA" ] || [ "$LATEST_TAG_SHA" = "null" ]; then
             echo "Error: Could not fetch SHA for tag $LATEST_TAG"
             exit 1
           fi
+          LATEST_SHA=$(curl -sL "https://api.github.com/repos/cloudflare/lol-html/git/tags/$LATEST_TAG_SHA" | jq -r '.object.sha')
+          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+            echo "Error: Could not fetch SHA for tag $LATEST_TAG @ $LATEST_TAG_SHA"
+            exit 1
+          fi
 
           if ! [[ $LATEST_SHA =~ ^[0-9a-f]{40}$ ]]; then
             echo "Error: Invalid SHA format received from GitHub"
@@ -89,4 +94,6 @@ jobs:
 
             Updates lolhtml to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/cloudflare/lol-html/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-lolhtml.yml)

.github/workflows/update-lshpack.yml

@@ -50,11 +50,16 @@ jobs:
             exit 1
           fi
 
-          LATEST_SHA=$(curl -sL "https://api.github.com/repos/litespeedtech/ls-hpack/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
-          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+          LATEST_TAG_SHA=$(curl -sL "https://api.github.com/repos/litespeedtech/ls-hpack/git/ref/tags/$LATEST_TAG" | jq -r '.object.sha')
+          if [ -z "$LATEST_TAG_SHA" ] || [ "$LATEST_TAG_SHA" = "null" ]; then
             echo "Error: Could not fetch SHA for tag $LATEST_TAG"
             exit 1
           fi
+          LATEST_SHA=$(curl -sL "https://api.github.com/repos/litespeedtech/ls-hpack/git/tags/$LATEST_TAG_SHA" | jq -r '.object.sha')
+          if [ -z "$LATEST_SHA" ] || [ "$LATEST_SHA" = "null" ]; then
+            echo "Error: Could not fetch SHA for tag $LATEST_TAG @ $LATEST_TAG_SHA"
+            exit 1
+          fi
 
           if ! [[ $LATEST_SHA =~ ^[0-9a-f]{40}$ ]]; then
             echo "Error: Invalid SHA format received from GitHub"
@@ -89,4 +94,6 @@ jobs:
 
             Updates lshpack to version ${{ steps.check-version.outputs.tag }}
 
+            Compare: https://github.com/litespeedtech/ls-hpack/compare/${{ steps.check-version.outputs.current }}...${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-lshpack.yml)

.github/workflows/update-root-certs.yml

@@ -0,0 +1,82 @@
+name: Daily Root Certs Update Check
+
+on:
+  schedule:
+    - cron: "0 0 * * *" # Runs at 00:00 UTC every day
+  workflow_dispatch: # Allows manual trigger
+
+jobs:
+  check-and-update:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
+        with:
+          bun-version: latest
+
+      - name: Generate root certs and capture output
+        id: generate-certs
+        run: |
+          cd packages/bun-usockets/
+          OUTPUT=$(bun generate-root-certs.mjs -v)
+          echo "cert_output<<EOF" >> $GITHUB_ENV
+          echo "$OUTPUT" >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+
+      - name: Check for changes and stage files
+        id: check-changes
+        run: |
+          if [[ -n "$(git status --porcelain)" ]]; then
+            echo "Found changes, staging modified files..."
+            git config --global user.name "github-actions[bot]"
+            git config --global user.email "github-actions[bot]@users.noreply.github.com"
+            
+            # Get list of modified files and add them
+            git status --porcelain | while read -r status file; do
+              # Remove leading status and whitespace
+              file=$(echo "$file" | sed 's/^.* //')
+              echo "Adding changed file: $file"
+              git add "$file"
+            done
+            
+            echo "changes=true" >> $GITHUB_OUTPUT
+            
+            # Store the list of changed files
+            CHANGED_FILES=$(git status --porcelain)
+            echo "changed_files<<EOF" >> $GITHUB_ENV
+            echo "$CHANGED_FILES" >> $GITHUB_ENV
+            echo "EOF" >> $GITHUB_ENV
+          else
+            echo "No changes detected"
+            echo "changes=false" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Create Pull Request
+        if: steps.check-changes.outputs.changes == 'true'
+        uses: peter-evans/create-pull-request@v5
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          commit-message: "update(root_certs): Update root certificates $(date +'%Y-%m-%d')"
+          title: "update(root_certs) $(date +'%Y-%m-%d')"
+          body: |
+            Automated root certificates update
+
+            ${{ env.cert_output }}
+
+            ## Changed Files:
+            ```
+            ${{ env.changed_files }}
+            ```
+          branch: certs/update-root-certs-${{ github.run_number }}
+          base: main
+          delete-branch: true
+          labels:
+            - "automation"
+            - "root-certs"

.github/workflows/update-sqlite3.yml

@@ -55,7 +55,7 @@ jobs:
 
           # Convert numeric version to semantic version for display
           LATEST_MAJOR=$((10#$LATEST_VERSION_NUM / 1000000))
-          LATEST_MINOR=$((($LATEST_VERSION_NUM / 1000) % 1000))
+          LATEST_MINOR=$((($LATEST_VERSION_NUM / 10000) % 100))
           LATEST_PATCH=$((10#$LATEST_VERSION_NUM % 1000))
           LATEST_VERSION="$LATEST_MAJOR.$LATEST_MINOR.$LATEST_PATCH"
 
@@ -106,4 +106,6 @@ jobs:
 
             Updates SQLite to version ${{ steps.check-version.outputs.latest }}
 
+            Compare: https://sqlite.org/src/vdiff?from=${{ steps.check-version.outputs.current }}&to=${{ steps.check-version.outputs.latest }}
+
             Auto-updated by [this workflow](https://github.com/oven-sh/bun/actions/workflows/update-sqlite3.yml)

.github/workflows/zig-format.yml

@@ -10,7 +10,7 @@ on:
   merge_group:
 
 env:
-  BUN_VERSION: "1.1.44"
+  BUN_VERSION: "1.2.0"
 
 jobs:
   zig-format:

.gitignore

@@ -16,6 +16,7 @@
 .vscode/clang*
 .vscode/cpp*
 .zig-cache
+.bake-debug
 *.a
 *.bc
 *.big
@@ -151,6 +152,8 @@ src/bake/generated.ts
 test/cli/install/registry/packages/publish-pkg-*
 test/cli/install/registry/packages/@secret/publish-pkg-8
 test/js/third_party/prisma/prisma/sqlite/dev.db-journal
+tmp
+codegen-for-zig-team.tar.gz
 
 # Dependencies
 /vendor
@@ -178,4 +181,6 @@ test/js/third_party/prisma/prisma/sqlite/dev.db-journal
 
 .buildkite/ci.yml
 *.sock
-scratch*.{js,ts,tsx,cjs,mjs}
+scratch*.{js,ts,tsx,cjs,mjs}
+
+*.bun-build

.lldbinit

@@ -1,4 +1,16 @@
-# command script import vendor/zig/tools/lldb_pretty_printers.py
-command script import vendor/WebKit/Tools/lldb/lldb_webkit.py
+# Tell LLDB what to do when the debugged process receives SIGPWR: pass it through to the process
+# (-p), but do not stop the process (-s) or notify the user (-n).
+#
+# JSC's garbage collector sends this signal (as configured by Bun WebKit in
+# Thread::initializePlatformThreading() in ThreadingPOSIX.cpp) to the JS thread to suspend or resume
+# it. So stopping the process would just create noise when debugging any long-running script.
+process handle -p true -s false -n false SIGPWR
 
-# type summary add --summary-string "${var} | inner=${var[0-30]}, source=${var[33-64]}, tag=${var[31-32]}" "unsigned long"
+command script import misctools/lldb/lldb_pretty_printers.py
+type category enable zig.lang
+type category enable zig.std
+
+command script import misctools/lldb/lldb_webkit.py
+
+command script delete btjs
+command alias btjs p {printf("gathering btjs trace...\n");printf("%s\n", (char*)dumpBtjsTrace())}

.prettierignore

@@ -7,3 +7,4 @@ src/react-refresh.js
 *.min.js
 test/snippets
 test/js/node/test
+bun.lock

.vscode/launch.json

@@ -22,7 +22,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -38,7 +37,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -60,7 +58,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -76,7 +73,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -92,7 +88,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -108,7 +103,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -125,7 +119,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -147,7 +140,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -169,7 +161,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -188,7 +179,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -203,7 +193,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -221,7 +210,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -236,7 +224,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -253,7 +240,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -275,7 +261,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -297,7 +282,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -313,7 +297,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -329,7 +312,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -345,7 +327,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -361,7 +342,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -378,7 +358,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -400,7 +379,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -421,7 +399,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     // bun test [*]
     {
@@ -437,7 +414,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -452,7 +428,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -468,7 +443,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
       "serverReadyAction": {
         "pattern": "https://debug.bun.sh/#localhost:([0-9]+)/",
         "uriFormat": "https://debug.bun.sh/#ws://localhost:%s/",
@@ -488,7 +462,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     {
       "type": "lldb",
@@ -503,7 +476,6 @@
       },
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
     },
     // Windows: bun test [file]
     {
@@ -1129,7 +1101,28 @@
       ],
       "console": "internalConsole",
       // Don't pause when the GC runs while the debugger is open.
-      "postRunCommands": ["command source '${workspaceFolder}/misctools/lldb/lldb_commands'"],
+    },
+    {
+      "type": "bun",
+      "name": "[JS] bun test [file]",
+      "runtime": "${workspaceFolder}/build/debug/bun-debug",
+      "runtimeArgs": ["test", "${file}"],
+      "cwd": "${workspaceFolder}",
+      "env": {
+        "BUN_DEBUG_QUIET_LOGS": "1",
+        "BUN_GARBAGE_COLLECTOR_LEVEL": "2",
+      },
+    },
+    {
+      "type": "midas-rr",
+      "request": "attach",
+      "name": "rr",
+      "trace": "Off",
+      "setupCommands": [
+        "handle SIGPWR nostop noprint pass",
+        "source ${workspaceFolder}/misctools/gdb/std_gdb_pretty_printers.py",
+        "source ${workspaceFolder}/misctools/gdb/zig_gdb_pretty_printers.py",
+      ],
     },
   ],
   "inputs": [

.vscode/settings.json

@@ -36,6 +36,7 @@
   // "zig.buildOnSave": true,
   "zig.buildFilePath": "${workspaceFolder}/build.zig",
   "zig.path": "${workspaceFolder}/vendor/zig/zig.exe",
+  "zig.zls.path": "${workspaceFolder}/vendor/zig/zls.exe",
   "zig.formattingProvider": "zls",
   "zig.zls.enableInlayHints": false,
   "[zig]": {
@@ -63,6 +64,7 @@
     "editor.tabSize": 4,
     "editor.defaultFormatter": "xaver.clang-format",
   },
+  "clangd.arguments": ["--header-insertion=never"],
 
   // JavaScript
   "prettier.enable": true,
@@ -139,8 +141,13 @@
     "packages/bun-uws/fuzzing": true,
   },
   "files.associations": {
+    "*.css": "tailwindcss",
     "*.idl": "cpp",
+    "*.mdc": "markdown",
     "array": "cpp",
+    "ios": "cpp",
+    "oxlint.json": "jsonc",
+    "bun.lock": "jsonc",
   },
   "C_Cpp.files.exclude": {
     "**/.vscode": true,

CMakeLists.txt

@@ -12,6 +12,12 @@ list(APPEND CMAKE_MODULE_PATH
 include(Policies)
 include(Globals)
 
+if (CMAKE_HOST_WIN32)
+  # Workaround for TLS certificate verification issue on Windows when downloading from GitHub
+  # Remove this once we've bumped the CI machines build image
+  set(CMAKE_TLS_VERIFY 0)
+endif()
+
 # --- Compilers ---
 
 if(CMAKE_HOST_APPLE)

CONTRIBUTING.md

@@ -53,17 +53,17 @@ $ brew install bun
 
 ## Install LLVM
 
-Bun requires LLVM 18 (`clang` is part of LLVM). This version requirement is to match WebKit (precompiled), as mismatching versions will cause memory allocation failures at runtime. In most cases, you can install LLVM through your system package manager:
+Bun requires LLVM 19 (`clang` is part of LLVM). This version requirement is to match WebKit (precompiled), as mismatching versions will cause memory allocation failures at runtime. In most cases, you can install LLVM through your system package manager:
 
 {% codetabs group="os" %}
 
 ```bash#macOS (Homebrew)
-$ brew install llvm@18
+$ brew install llvm@19
 ```
 
 ```bash#Ubuntu/Debian
 $ # LLVM has an automatic installation script that is compatible with all versions of Ubuntu
-$ wget https://apt.llvm.org/llvm.sh -O - | sudo bash -s -- 18 all
+$ wget https://apt.llvm.org/llvm.sh -O - | sudo bash -s -- 19 all
 ```
 
 ```bash#Arch
@@ -71,21 +71,21 @@ $ sudo pacman -S llvm clang lld
 ```
 
 ```bash#Fedora
-$ sudo dnf install llvm18 clang18 lld18-devel
+$ sudo dnf install llvm clang lld-devel
 ```
 
 ```bash#openSUSE Tumbleweed
-$ sudo zypper install clang18 lld18 llvm18
+$ sudo zypper install clang19 lld19 llvm19
 ```
 
 {% /codetabs %}
 
-If none of the above solutions apply, you will have to install it [manually](https://github.com/llvm/llvm-project/releases/tag/llvmorg-18.1.8).
+If none of the above solutions apply, you will have to install it [manually](https://github.com/llvm/llvm-project/releases/tag/llvmorg-19.1.7).
 
-Make sure Clang/LLVM 18 is in your path:
+Make sure Clang/LLVM 19 is in your path:
 
 ```bash
-$ which clang-18
+$ which clang-19
 ```
 
 If not, run this to manually add it:
@@ -94,13 +94,13 @@ If not, run this to manually add it:
 
 ```bash#macOS (Homebrew)
 # use fish_add_path if you're using fish
-# use path+="$(brew --prefix llvm@18)/bin" if you are using zsh
-$ export PATH="$(brew --prefix llvm@18)/bin:$PATH"
+# use path+="$(brew --prefix llvm@19)/bin" if you are using zsh
+$ export PATH="$(brew --prefix llvm@19)/bin:$PATH"
 ```
 
 ```bash#Arch
 # use fish_add_path if you're using fish
-$ export PATH="$PATH:/usr/lib/llvm18/bin"
+$ export PATH="$PATH:/usr/lib/llvm19/bin"
 ```
 
 {% /codetabs %}
@@ -134,6 +134,16 @@ We recommend adding `./build/debug` to your `$PATH` so that you can run `bun-deb
 $ bun-debug
 ```
 
+## Running debug builds
+
+The `bd` package.json script compiles and runs a debug build of Bun, only printing the output of the build process if it fails.
+
+```sh
+$ bun bd <args>
+$ bun bd test foo.test.ts
+$ bun bd ./foo.ts
+```
+
 ## Code generation scripts
 
 Several code generation scripts are used during Bun's build process. These are run automatically when changes are made to certain files.
@@ -205,18 +215,30 @@ WebKit is not cloned by default (to save time and disk space). To clone and buil
 # Clone WebKit into ./vendor/WebKit
 $ git clone https://github.com/oven-sh/WebKit vendor/WebKit
 
+# Check out the commit hash specified in `set(WEBKIT_VERSION <commit_hash>)` in cmake/tools/SetupWebKit.cmake
+$ git -C vendor/WebKit checkout <commit_hash>
+
 # Make a debug build of JSC. This will output build artifacts in ./vendor/WebKit/WebKitBuild/Debug
 # Optionally, you can use `make jsc` for a release build
-$ make jsc-debug
+$ make jsc-debug && rm vendor/WebKit/WebKitBuild/Debug/JavaScriptCore/DerivedSources/inspector/InspectorProtocolObjects.h
 
 # Build bun with the local JSC build
 $ bun run build:local
 ```
 
+Using `bun run build:local` will build Bun in the `./build/debug-local` directory (instead of `./build/debug`), you'll have to change a couple of places to use this new directory:
+
+- The first line in [`src/js/builtins.d.ts`](/src/js/builtins.d.ts)
+- The `CompilationDatabase` line in [`.clangd` config](/.clangd) should be `CompilationDatabase: build/debug-local`
+- In [`build.zig`](/build.zig), the `codegen_path` option should be `build/debug-local/codegen` (instead of `build/debug/codegen`)
+- In [`.vscode/launch.json`](/.vscode/launch.json), many configurations use `./build/debug/`, change them as you see fit
+
 Note that the WebKit folder, including build artifacts, is 8GB+ in size.
 
 If you are using a JSC debug build and using VScode, make sure to run the `C/C++: Select a Configuration` command to configure intellisense to find the debug headers.
 
+Note that if you change make changes to our [WebKit fork](https://github.com/oven-sh/WebKit), you will also have to change [`SetupWebKit.cmake`](/cmake/tools/SetupWebKit.cmake) to point to the commit hash.
+
 ## Troubleshooting
 
 ### 'span' file not found on Ubuntu
@@ -238,7 +260,7 @@ The issue may manifest when initially running `bun setup` as Clang being unable
 ```
 The C++ compiler
 
-  "/usr/bin/clang++-18"
+  "/usr/bin/clang++-19"
 
 is not able to compile a simple test program.
 ```

LATEST

@@ -1 +1 @@
-1.2.0
+1.2.10

Makefile

@@ -91,9 +91,9 @@ ZIG ?= $(shell which zig 2>/dev/null || echo -e "error: Missing zig. Please make
 # This is easier to happen than you'd expect.
 # Using realpath here causes issues because clang uses clang++ as a symlink
 # so if that's resolved, it won't build for C++
-REAL_CC = $(shell which clang-18 2>/dev/null || which clang 2>/dev/null)
-REAL_CXX = $(shell which clang++-18 2>/dev/null || which clang++ 2>/dev/null)
-CLANG_FORMAT = $(shell which clang-format-18 2>/dev/null || which clang-format 2>/dev/null)
+REAL_CC = $(shell which clang-19 2>/dev/null || which clang 2>/dev/null)
+REAL_CXX = $(shell which clang++-19 2>/dev/null || which clang++ 2>/dev/null)
+CLANG_FORMAT = $(shell which clang-format-19 2>/dev/null || which clang-format 2>/dev/null)
 
 CC = $(REAL_CC)
 CXX = $(REAL_CXX)
@@ -117,14 +117,14 @@ CC_WITH_CCACHE = $(CCACHE_PATH) $(CC)
 ifeq ($(OS_NAME),darwin)
 # Find LLVM
 	ifeq ($(wildcard $(LLVM_PREFIX)),)
-		LLVM_PREFIX = $(shell brew --prefix llvm@18)
+		LLVM_PREFIX = $(shell brew --prefix llvm@19)
 	endif
 	ifeq ($(wildcard $(LLVM_PREFIX)),)
 		LLVM_PREFIX = $(shell brew --prefix llvm)
 	endif
 	ifeq ($(wildcard $(LLVM_PREFIX)),)
 #   This is kinda ugly, but I can't find a better way to error :(
-		LLVM_PREFIX = $(shell echo -e "error: Unable to find llvm. Please run 'brew install llvm@18' or set LLVM_PREFIX=/path/to/llvm")
+		LLVM_PREFIX = $(shell echo -e "error: Unable to find llvm. Please run 'brew install llvm@19' or set LLVM_PREFIX=/path/to/llvm")
 	endif
 
 	LDFLAGS += -L$(LLVM_PREFIX)/lib
@@ -164,7 +164,7 @@ CMAKE_FLAGS_WITHOUT_RELEASE = -DCMAKE_C_COMPILER=$(CC) \
 	-DCMAKE_OSX_DEPLOYMENT_TARGET=$(MIN_MACOS_VERSION) \
 	$(CMAKE_CXX_COMPILER_LAUNCHER_FLAG) \
 	-DCMAKE_AR=$(AR) \
-	-DCMAKE_RANLIB=$(which llvm-18-ranlib 2>/dev/null || which llvm-ranlib 2>/dev/null) \
+	-DCMAKE_RANLIB=$(which llvm-19-ranlib 2>/dev/null || which llvm-ranlib 2>/dev/null) \
 	-DCMAKE_CXX_STANDARD=20 \
 	-DCMAKE_C_STANDARD=17 \
 	-DCMAKE_CXX_STANDARD_REQUIRED=ON \
@@ -191,7 +191,7 @@ endif
 
 ifeq ($(OS_NAME),linux)
 LIBICONV_PATH =
-AR = $(shell which llvm-ar-18 2>/dev/null || which llvm-ar 2>/dev/null || which ar 2>/dev/null)
+AR = $(shell which llvm-ar-19 2>/dev/null || which llvm-ar 2>/dev/null || which ar 2>/dev/null)
 endif
 
 OPTIMIZATION_LEVEL=-O3 $(MARCH_NATIVE)
@@ -255,7 +255,7 @@ DEFAULT_LINKER_FLAGS= -pthread -ldl
 endif
 ifeq ($(OS_NAME),darwin)
     _MIMALLOC_OBJECT_FILE = 0
-	JSC_BUILD_STEPS += jsc-build-mac jsc-copy-headers
+	JSC_BUILD_STEPS += jsc-build-mac
 	JSC_BUILD_STEPS_DEBUG += jsc-build-mac-debug
 	_MIMALLOC_FILE = libmimalloc.a
 	_MIMALLOC_INPUT_PATH = libmimalloc.a
@@ -286,7 +286,7 @@ STRIP=/usr/bin/strip
 endif
 
 ifeq ($(OS_NAME),linux)
-STRIP=$(shell which llvm-strip 2>/dev/null || which llvm-strip-18 2>/dev/null || which strip 2>/dev/null || echo "Missing strip")
+STRIP=$(shell which llvm-strip 2>/dev/null || which llvm-strip-19 2>/dev/null || which strip 2>/dev/null || echo "Missing strip")
 endif
 
 
@@ -674,7 +674,7 @@ endif
 .PHONY: assert-deps
 assert-deps:
 	@echo "Checking if the required utilities are available..."
-	@if [ $(CLANG_VERSION) -lt "18" ]; then echo -e "ERROR: clang version >=18 required, found: $(CLANG_VERSION). Install with:\n\n    $(POSIX_PKG_MANAGER) install llvm@18"; exit 1; fi
+	@if [ $(CLANG_VERSION) -lt "19" ]; then echo -e "ERROR: clang version >=19 required, found: $(CLANG_VERSION). Install with:\n\n    $(POSIX_PKG_MANAGER) install llvm@19"; exit 1; fi
 	@cmake --version >/dev/null 2>&1 || (echo -e "ERROR: cmake is required."; exit 1)
 	@$(PYTHON) --version >/dev/null 2>&1 || (echo -e "ERROR: python is required."; exit 1)
 	@$(ESBUILD) --version >/dev/null 2>&1 || (echo -e "ERROR: esbuild is required."; exit 1)
@@ -924,7 +924,7 @@ bun-codesign-release-local-debug:
 
 
 .PHONY: jsc
-jsc: jsc-build jsc-copy-headers jsc-bindings
+jsc: jsc-build
 .PHONY: jsc-debug
 jsc-debug: jsc-build-debug
 .PHONY: jsc-build
@@ -1154,7 +1154,7 @@ jsc-copy-headers:
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/bytecode/StubInfoSummary.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/StubInfoSummary.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/CommonSlowPaths.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/CommonSlowPaths.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/DirectArguments.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/DirectArguments.h
-	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/GenericArguments.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/GenericArguments.h
+	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/GenericArgumentsImpl.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/GenericArgumentsImpl.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/SamplingProfiler.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/SamplingProfiler.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/ScopedArguments.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/ScopedArguments.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/JSLexicalEnvironment.h $(WEBKIT_RELEASE_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/JSLexicalEnvironment.h
@@ -1205,7 +1205,7 @@ jsc-copy-headers-debug:
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/bytecode/StubInfoSummary.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/StubInfoSummary.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/CommonSlowPaths.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/CommonSlowPaths.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/DirectArguments.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/DirectArguments.h
-	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/GenericArguments.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/GenericArguments.h
+	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/GenericArgumentsImpl.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/GenericArgumentsImpl.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/SamplingProfiler.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/SamplingProfiler.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/ScopedArguments.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/ScopedArguments.h
 	cp $(WEBKIT_DIR)/Source/JavaScriptCore/runtime/JSLexicalEnvironment.h $(WEBKIT_DEBUG_DIR)/JavaScriptCore/PrivateHeaders/JavaScriptCore/JSLexicalEnvironment.h
@@ -1301,6 +1301,7 @@ jsc-build-mac-compile-lto:
 .PHONY: jsc-build-mac-compile-debug
 jsc-build-mac-compile-debug:
 	mkdir -p $(WEBKIT_DEBUG_DIR) $(WEBKIT_DIR);
+	# to disable asan, remove -DENABLE_SANITIZERS=address and add -DENABLE_MALLOC_HEAP_BREAKDOWN=ON
 	cd $(WEBKIT_DEBUG_DIR) && \
 		ICU_INCLUDE_DIRS="$(HOMEBREW_PREFIX)opt/icu4c/include" \
 		cmake \
@@ -1309,7 +1310,6 @@ jsc-build-mac-compile-debug:
 			-DCMAKE_BUILD_TYPE=Debug \
 			-DUSE_THIN_ARCHIVES=OFF \
 			-DENABLE_FTL_JIT=ON \
-			-DENABLE_MALLOC_HEAP_BREAKDOWN=ON \
 			-DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
 			-DUSE_BUN_JSC_ADDITIONS=ON \
 			-DUSE_BUN_EVENT_LOOP=ON \
@@ -1321,6 +1321,7 @@ jsc-build-mac-compile-debug:
 			-DUSE_PTHREAD_JIT_PERMISSIONS_API=ON \
 			-DENABLE_REMOTE_INSPECTOR=ON \
 			-DUSE_VISIBILITY_ATTRIBUTE=1 \
+			-DENABLE_SANITIZERS=address \
 			$(WEBKIT_DIR) \
 			$(WEBKIT_DEBUG_DIR) && \
 	CFLAGS="$(CFLAGS) -ffat-lto-objects" CXXFLAGS="$(CXXFLAGS) -ffat-lto-objects" \

bench/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "bench",

bench/crypto/aes-gcm-throughput.mjs

@@ -0,0 +1,44 @@
+import { bench, run } from "../runner.mjs";
+import crypto from "node:crypto";
+import { Buffer } from "node:buffer";
+
+const keylen = { "aes-128-gcm": 16, "aes-192-gcm": 24, "aes-256-gcm": 32 };
+const sizes = [4 * 1024, 1024 * 1024];
+const ciphers = ["aes-128-gcm", "aes-192-gcm", "aes-256-gcm"];
+
+const messages = {};
+sizes.forEach(size => {
+  messages[size] = Buffer.alloc(size, "b");
+});
+
+const keys = {};
+ciphers.forEach(cipher => {
+  keys[cipher] = crypto.randomBytes(keylen[cipher]);
+});
+
+// Fixed IV and AAD
+const iv = crypto.randomBytes(12);
+const associate_data = Buffer.alloc(16, "z");
+
+for (const cipher of ciphers) {
+  for (const size of sizes) {
+    const message = messages[size];
+    const key = keys[cipher];
+
+    bench(`${cipher} ${size / 1024}KB`, () => {
+      const alice = crypto.createCipheriv(cipher, key, iv);
+      alice.setAAD(associate_data);
+      const enc = alice.update(message);
+      alice.final();
+      const tag = alice.getAuthTag();
+
+      const bob = crypto.createDecipheriv(cipher, key, iv);
+      bob.setAuthTag(tag);
+      bob.setAAD(associate_data);
+      bob.update(enc);
+      bob.final();
+    });
+  }
+}
+
+await run();

bench/crypto/diffie-hellman.mjs

@@ -0,0 +1,53 @@
+import crypto from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+// Pre-generate DH params to avoid including setup in benchmarks
+const dhSize = 1024; // Reduced from 2048 for faster testing
+const dh = crypto.createDiffieHellman(dhSize);
+const dhPrime = dh.getPrime();
+const dhGenerator = dh.getGenerator();
+
+// Classical Diffie-Hellman
+bench("DH - generateKeys", () => {
+  const alice = crypto.createDiffieHellman(dhPrime, dhGenerator);
+  return alice.generateKeys();
+});
+
+bench("DH - computeSecret", () => {
+  // Setup
+  const alice = crypto.createDiffieHellman(dhPrime, dhGenerator);
+  const aliceKey = alice.generateKeys();
+  const bob = crypto.createDiffieHellman(dhPrime, dhGenerator);
+  const bobKey = bob.generateKeys();
+
+  // Benchmark just the secret computation
+  return alice.computeSecret(bobKey);
+});
+
+// ECDH with prime256v1 (P-256)
+bench("ECDH-P256 - generateKeys", () => {
+  const ecdh = crypto.createECDH("prime256v1");
+  return ecdh.generateKeys();
+});
+
+bench("ECDH-P256 - computeSecret", () => {
+  // Setup
+  const alice = crypto.createECDH("prime256v1");
+  const aliceKey = alice.generateKeys();
+  const bob = crypto.createECDH("prime256v1");
+  const bobKey = bob.generateKeys();
+
+  // Benchmark just the secret computation
+  return alice.computeSecret(bobKey);
+});
+
+// ECDH with secp384r1 (P-384)
+bench("ECDH-P384 - computeSecret", () => {
+  const alice = crypto.createECDH("secp384r1");
+  const aliceKey = alice.generateKeys();
+  const bob = crypto.createECDH("secp384r1");
+  const bobKey = bob.generateKeys();
+  return alice.computeSecret(bobKey);
+});
+
+await run();

bench/crypto/ecdh-convert-key.mjs

@@ -0,0 +1,44 @@
+import crypto from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+function generateTestKeyPairs() {
+  const curves = crypto.getCurves();
+  const keys = {};
+
+  for (const curve of curves) {
+    const ecdh = crypto.createECDH(curve);
+    ecdh.generateKeys();
+
+    keys[curve] = {
+      compressed: ecdh.getPublicKey("hex", "compressed"),
+      uncompressed: ecdh.getPublicKey("hex", "uncompressed"),
+      instance: ecdh,
+    };
+  }
+
+  return keys;
+}
+
+const testKeys = generateTestKeyPairs();
+
+bench("ECDH key format - P256 compressed to uncompressed", () => {
+  const publicKey = testKeys["prime256v1"].compressed;
+  return crypto.ECDH.convertKey(publicKey, "prime256v1", "hex", "hex", "uncompressed");
+});
+
+bench("ECDH key format - P256 uncompressed to compressed", () => {
+  const publicKey = testKeys["prime256v1"].uncompressed;
+  return crypto.ECDH.convertKey(publicKey, "prime256v1", "hex", "hex", "compressed");
+});
+
+bench("ECDH key format - P384 compressed to uncompressed", () => {
+  const publicKey = testKeys["secp384r1"].compressed;
+  return crypto.ECDH.convertKey(publicKey, "secp384r1", "hex", "hex", "uncompressed");
+});
+
+bench("ECDH key format - P384 uncompressed to compressed", () => {
+  const publicKey = testKeys["secp384r1"].uncompressed;
+  return crypto.ECDH.convertKey(publicKey, "secp384r1", "hex", "hex", "compressed");
+});
+
+await run();

bench/crypto/hkdf.mjs

@@ -0,0 +1,50 @@
+import crypto from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+// Sample keys with different lengths
+const keys = {
+  short: "secret",
+  long: "this-is-a-much-longer-secret-aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+};
+
+// Test parameters
+const salts = ["", "salt"];
+const infos = ["", "info"];
+const hashes = ["sha256", "sha512"];
+const sizes = [10, 1024];
+
+// Benchmark sync HKDF
+for (const hash of hashes) {
+  for (const keyName of Object.keys(keys)) {
+    const key = keys[keyName];
+    for (const size of sizes) {
+      bench(`hkdfSync ${hash} ${keyName}-key ${size} bytes`, () => {
+        return crypto.hkdfSync(hash, key, "salt", "info", size);
+      });
+    }
+  }
+}
+
+// Benchmark different combinations of salt and info
+for (const salt of salts) {
+  for (const info of infos) {
+    bench(`hkdfSync sha256 with ${salt ? "salt" : "no-salt"} and ${info ? "info" : "no-info"}`, () => {
+      return crypto.hkdfSync("sha256", "secret", salt, info, 64);
+    });
+  }
+}
+
+// Benchmark async HKDF (using promises for cleaner benchmark)
+// Note: async benchmarks in Mitata require returning a Promise
+for (const hash of hashes) {
+  bench(`hkdf ${hash} async`, async () => {
+    return new Promise((resolve, reject) => {
+      crypto.hkdf(hash, "secret", "salt", "info", 64, (err, derivedKey) => {
+        if (err) reject(err);
+        else resolve(derivedKey);
+      });
+    });
+  });
+}
+
+await run();

bench/crypto/primes.mjs

@@ -0,0 +1,43 @@
+import { checkPrime, checkPrimeSync, generatePrime, generatePrimeSync } from "node:crypto";
+import { bench, run } from "../runner.mjs";
+
+const prime512 = generatePrimeSync(512);
+const prime2048 = generatePrimeSync(2048);
+
+bench("checkPrimeSync 512", () => {
+  return checkPrimeSync(prime512);
+});
+
+bench("checkPrimeSync 2048", () => {
+  return checkPrimeSync(prime2048);
+});
+
+bench("checkPrime 512", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => checkPrime(prime512, resolve)));
+  await Promise.all(promises);
+});
+
+bench("checkPrime 2048", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => checkPrime(prime2048, resolve)));
+  await Promise.all(promises);
+});
+
+bench("generatePrimeSync 512", () => {
+  return generatePrimeSync(512);
+});
+
+bench("generatePrimeSync 2048", () => {
+  return generatePrimeSync(2048);
+});
+
+bench("generatePrime 512", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => generatePrime(512, resolve)));
+  await Promise.all(promises);
+});
+
+bench("generatePrime 2048", async () => {
+  const promises = Array.from({ length: 10 }, () => new Promise(resolve => generatePrime(2048, resolve)));
+  await Promise.all(promises);
+});
+
+await run();

bench/crypto/random.mjs

@@ -0,0 +1,50 @@
+import crypto from "crypto";
+import { bench, run } from "../runner.mjs";
+
+bench("randomInt - sync", () => {
+  crypto.randomInt(1000);
+});
+
+bench("randomInt - async", async () => {
+  const { promise, resolve } = Promise.withResolvers();
+  crypto.randomInt(1000, () => {
+    resolve();
+  });
+  await promise;
+});
+
+bench("randonBytes - 32", () => {
+  crypto.randomBytes(32);
+});
+
+bench("randomBytes - 256", () => {
+  crypto.randomBytes(256);
+});
+
+const buf = Buffer.alloc(256);
+
+bench("randomFill - 32", async () => {
+  const { promise, resolve } = Promise.withResolvers();
+  crypto.randomFill(buf, 0, 32, () => {
+    resolve();
+  });
+  await promise;
+});
+
+bench("randomFill - 256", async () => {
+  const { promise, resolve } = Promise.withResolvers();
+  crypto.randomFill(buf, 0, 256, () => {
+    resolve();
+  });
+  await promise;
+});
+
+bench("randomFillSync - 32", () => {
+  crypto.randomFillSync(buf, 0, 32);
+});
+
+bench("randomFillSync - 256", () => {
+  crypto.randomFillSync(buf, 0, 256);
+});
+
+await run();

bench/expect-to-equal/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "expect-to-equal",

bench/express/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     // Enable latest features
-    "lib": ["ESNext", "DOM"],
+    "lib": ["ESNext"],
     "target": "ESNext",
     "module": "ESNext",
     "moduleDetection": "force",

bench/ffi/src/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "bench",

bench/glob/match.mjs

@@ -1,19 +1,27 @@
-import micromatch from "micromatch";
+import { Glob } from "bun";
 import { bench, run } from "../runner.mjs";
 
-const Glob = typeof Bun !== "undefined" ? Bun.Glob : undefined;
-const doMatch = typeof Bun === "undefined" ? micromatch.isMatch : (a, b) => new Glob(b).match(a);
 
-bench((Glob ? "Bun.Glob - " : "micromatch - ") + "**/*.js", () => {
-  doMatch("foo/bar.js", "**/*.js");
-});
+function benchPattern(name, glob, pattern) {
+    bench(name, () => {
+        new Glob(glob).match(pattern);
+    })
+}
+
+benchPattern("max-depth" , "1{2,3{4,5{6,7{8,9{a,b{c,d{e,f{g,h{i,j{k,l}}}}}}}}}}m", "13579bdfhjlm");
+benchPattern("non-ascii", "😎/¢£.{ts,tsx,js,jsx}", "😎/¢£.jsx");
+benchPattern("utf8", "フォルダ/**/*", "フォルダ/aaa.js");
+benchPattern("non-ascii+max-depth" , "1{2,3{4,5{6,7{8,😎{a,b{c,d{e,f{g,h{i,j{k,l}}}}}}}}}}m", "1357😎bdfhjlm");
+benchPattern("pretty-average", "test/{foo/**,bar}/baz", "test/bar/baz");
+benchPattern("pretty-average-2", "a/**/c/*.md", "a/bb.bb/aa/b.b/aa/c/xyz.md");
+benchPattern("pretty-average-3", "a/b/**/c{d,e}/**/xyz.md", "a/b/cd/xyz.md");
+benchPattern("pretty-average-4", "foo/bar/**/one/**/*.*", "foo/bar/baz/one/two/three/image.png");
+benchPattern("long-pretty-average", "some/**/needle.{js,tsx,mdx,ts,jsx,txt}", "some/a/bigger/path/to/the/crazy/needle.txt");
+benchPattern("brackets-lots", "f[^eiu][^eiu][^eiu][^eiu][^eiu]r", "foo-bar");
 
-bench((Glob ? "Bun.Glob - " : "micromatch - ") + "*.js", () => {
-  doMatch("bar.js", "*.js");
-});
 
 await run({
-  avg: true,
-  min_max: true,
-  percentiles: true,
-});
+    min_max: true,
+    percentiles: true,
+    avg: true,
+})

bench/glob/micromatch.mjs

@@ -0,0 +1,19 @@
+import micromatch from "micromatch";
+import { bench, run } from "../runner.mjs";
+
+const Glob = typeof Bun !== "undefined" ? Bun.Glob : undefined;
+const doMatch = typeof Bun === "undefined" ? micromatch.isMatch : (a, b) => new Glob(b).match(a);
+
+bench((Glob ? "Bun.Glob - " : "micromatch - ") + "**/*.js", () => {
+  doMatch("foo/bar.js", "**/*.js");
+});
+
+bench((Glob ? "Bun.Glob - " : "micromatch - ") + "*.js", () => {
+  doMatch("bar.js", "*.js");
+});
+
+await run({
+  avg: true,
+  min_max: true,
+  percentiles: true,
+});

bench/gzip/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "bench",

bench/hot-module-reloading/css-stress-test/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "simple-react",

bench/package.json

@@ -12,6 +12,7 @@
     "eventemitter3": "^5.0.0",
     "execa": "^8.0.1",
     "fast-glob": "3.3.1",
+    "fastify": "^5.0.0",
     "fdir": "^6.1.0",
     "mitata": "^1.0.25",
     "react": "^18.3.1",

bench/postgres/tsconfig.json

@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
     // Enable latest features
-    "lib": ["ESNext", "DOM"],
+    "lib": ["ESNext"],
     "target": "ESNext",
     "module": "ESNext",
     "moduleDetection": "force",

bench/react-hello-world/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "react-hello-world",

bench/scanner/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "scan",

bench/snippets/buffer-create.mjs

@@ -39,24 +39,24 @@ bench("Buffer.from(ArrayBuffer(100))", () => {
   return Buffer.from(hundred);
 });
 
-bench("new Buffer(ArrayBuffer(100))", () => {
-  return new Buffer(hundred);
-});
-
 var hundredArray = new Uint8Array(100);
 bench("Buffer.from(Uint8Array(100))", () => {
   return Buffer.from(hundredArray);
 });
 
-bench("new Buffer(Uint8Array(100))", () => {
-  return new Buffer(hundredArray);
-});
-
 var empty = new Uint8Array(0);
 bench("Buffer.from(Uint8Array(0))", () => {
   return Buffer.from(empty);
 });
 
+bench("new Buffer(ArrayBuffer(100))", () => {
+  return new Buffer(hundred);
+});
+
+bench("new Buffer(Uint8Array(100))", () => {
+  return new Buffer(hundredArray);
+});
+
 bench("new Buffer(Uint8Array(0))", () => {
   return new Buffer(empty);
 });

bench/snippets/buffer-includes.js

@@ -0,0 +1,17 @@
+const buf = Buffer.from(
+  "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.",
+);
+const INTERVAL = 9_999_999;
+
+const time = (name, fn) => {
+  for (let i = 0; i < INTERVAL; i++) fn();
+
+  console.time(name.padEnd(30));
+  for (let i = 0; i < INTERVAL; i++) fn();
+  console.timeEnd(name.padEnd(30));
+};
+
+console.log(`Run ${new Intl.NumberFormat().format(INTERVAL)} times with a warmup:`, "\n");
+
+time("includes true", () => buf.includes("nisi"));
+time("includes false", () => buf.includes("oopwo"));

bench/snippets/buffer-write.mjs

@@ -0,0 +1,17 @@
+import { group as suite, bench, run } from "mitata";
+
+const bigBuf = Buffer.alloc(1024 * 256);
+// Fill with letter "A" encoded as UTF16
+for (let i = 0; i < bigBuf.length; i += 2) {
+  bigBuf[i] = 65; // ASCII/UTF16 code for 'A'
+  bigBuf[i + 1] = 0; // High byte for UTF16
+}
+
+var asUTF16LE = bigBuf.toString("utf16le");
+
+// await run();
+console.time("Buffer.from(bigBuf, 'utf16le')");
+for (let i = 0; i < 100000; i++) {
+  bigBuf.asciiWrite(asUTF16LE, 0, asUTF16LE.length);
+}
+console.timeEnd("Buffer.from(bigBuf, 'utf16le')");

bench/snippets/buffer.js

@@ -1,7 +1,7 @@
 // import { Buffer } from "buffer";
 var buf = new Buffer(1024);
 var view = new DataView(buf.buffer);
-var INTERVAL = 9999999;
+var INTERVAL = 9_999_999;
 var time = (name, fn) => {
   for (let i = 0; i < INTERVAL; i++) fn();
 

bench/snippets/decode.js

@@ -0,0 +1,71 @@
+import { bench, run } from "../runner.mjs";
+
+let decodeURIComponentSIMD;
+if (typeof Bun !== "undefined") {
+  ({ decodeURIComponentSIMD } = await import("bun:internal-for-testing"));
+}
+
+const hugeText = Buffer.alloc(1000000, "Hello, world!").toString();
+const hugeTextWithPercentAtEnd = Buffer.alloc(1000000, "Hello, world!%40").toString();
+
+const tinyText = Buffer.alloc(100, "Hello, world!").toString();
+const tinyTextWithPercentAtEnd = Buffer.alloc(100, "Hello, world!%40").toString();
+
+const veryTinyText = Buffer.alloc(8, "a").toString();
+const veryTinyTextWithPercentAtEnd = Buffer.alloc(8, "a%40").toString();
+
+decodeURIComponentSIMD &&
+  bench("decodeURIComponentSIMD -  no % x 8 bytes", () => {
+    decodeURIComponentSIMD(veryTinyText);
+  });
+
+bench("    decodeURIComponent -  no % x 8 bytes", () => {
+  decodeURIComponent(veryTinyText);
+});
+
+decodeURIComponentSIMD &&
+  bench("decodeURIComponentSIMD - yes % x 8 bytes", () => {
+    decodeURIComponentSIMD(veryTinyTextWithPercentAtEnd);
+  });
+
+bench("    decodeURIComponent - yes % x 8 bytes", () => {
+  decodeURIComponent(veryTinyTextWithPercentAtEnd);
+});
+
+decodeURIComponentSIMD &&
+  bench("decodeURIComponentSIMD -  no % x 100 bytes", () => {
+    decodeURIComponentSIMD(tinyText);
+  });
+
+bench("    decodeURIComponent -  no % x 100 bytes", () => {
+  decodeURIComponent(tinyText);
+});
+
+decodeURIComponentSIMD &&
+  bench("decodeURIComponentSIMD - yes % x 100 bytes", () => {
+    decodeURIComponentSIMD(tinyTextWithPercentAtEnd);
+  });
+
+bench("    decodeURIComponent - yes % x 100 bytes", () => {
+  decodeURIComponent(tinyTextWithPercentAtEnd);
+});
+
+decodeURIComponentSIMD &&
+  bench("decodeURIComponentSIMD -  no % x 1 MB", () => {
+    decodeURIComponentSIMD(hugeText);
+  });
+
+bench("    decodeURIComponent -  no % x 1 MB", () => {
+  decodeURIComponent(hugeText);
+});
+
+decodeURIComponentSIMD &&
+  bench("decodeURIComponentSIMD - yes % x 1 MB", () => {
+    decodeURIComponentSIMD(hugeTextWithPercentAtEnd);
+  });
+
+bench("    decodeURIComponent - yes % x 1 MB", () => {
+  decodeURIComponent(hugeTextWithPercentAtEnd);
+});
+
+await run();

bench/snippets/express-hello.mjs

@@ -0,0 +1,13 @@
+import express from "express";
+
+const app = express();
+const port = 3000;
+
+var i = 0;
+app.get("/", (req, res) => {
+  res.send("Hello World!" + i++);
+});
+
+app.listen(port, () => {
+  console.log(`Express app listening at http://localhost:${port}`);
+});

bench/snippets/fastify.mjs

@@ -0,0 +1,20 @@
+import Fastify from "fastify";
+
+const fastify = Fastify({
+  logger: false,
+});
+
+fastify.get("/", async (request, reply) => {
+  return { hello: "world" };
+});
+
+const start = async () => {
+  try {
+    await fastify.listen({ port: 3000 });
+  } catch (err) {
+    fastify.log.error(err);
+    process.exit(1);
+  }
+};
+
+start();

bench/snippets/path-relative.mjs

@@ -0,0 +1,25 @@
+import { posix } from "path";
+import { bench, run } from "../runner.mjs";
+
+const pathConfigurations = [
+  ["", ""],
+  [".", "."],
+  ["/foo/bar", "/foo/bar"],
+  ["/foo/bar/baz", "/foo/bar"],
+  ["/foo/bar", "/foo/bar/baz"],
+  ["/foo/bar/baz", "/foo/bar/qux"],
+  ["/foo/bar/baz", "/foo/bar/baz/qux"],
+  ["/foo/bar/baz", "/foo/bar/baz/qux/quux"],
+  ["/", "/foo"],
+  ["/foo", "/"],
+  ["foo/bar/baz", "foo/bar/qux"],
+  ["../foo/bar", "../foo/baz"],
+];
+
+pathConfigurations.forEach(([from, to]) => {
+  bench(`relative(${JSON.stringify(from)}, ${JSON.stringify(to)})`, () => {
+    globalThis.abc = posix.relative(from, to);
+  });
+});
+
+await run();

bench/snippets/redis-simple.mjs

@@ -0,0 +1,28 @@
+import ioredis from "ioredis";
+
+const redis = process.argv.includes("--redis=native")
+  ? Bun.redis
+  : new ioredis("redis://localhost:6379", {
+      enableAutoPipelining: true,
+    });
+
+const isBun = globalThis.Bun && redis === Bun.redis;
+for (let count of [100, 1000]) {
+  function iterate() {
+    const promises = new Array(count);
+    for (let i = 0; i < count; i++) {
+      promises[i] = redis.get("greeting");
+    }
+
+    return Promise.all(promises);
+  }
+
+  const label = isBun ? `Bun.redis` : `ioredis`;
+  console.time(`GET 'greeting' batches of ${count} - ${label} (${count} iterations)`);
+  for (let i = 0; i < 1000; i++) {
+    await iterate();
+  }
+  console.timeEnd(`GET 'greeting' batches of ${count} - ${label} (${count} iterations)`);
+}
+
+process.exit(0);

bench/snippets/request-method-getter.mjs

@@ -0,0 +1,14 @@
+import { bench, run } from "../runner.mjs";
+
+const url = "http://localhost:3000/";
+const clonable = new Request(url);
+
+bench("request.clone().method", () => {
+  return clonable.clone().method;
+});
+
+bench("new Request(url).method", () => {
+  return new Request(url).method;
+});
+
+await run();

bench/sqlite/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "bench",

bench/websocket-server/bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "websocket-server",

build.zig

@@ -4,7 +4,7 @@ const builtin = @import("builtin");
 const Build = std.Build;
 const Step = Build.Step;
 const Compile = Step.Compile;
-const LazyPath = Step.LazyPath;
+const LazyPath = Build.LazyPath;
 const Target = std.Target;
 const ResolvedTarget = std.Build.ResolvedTarget;
 const CrossTarget = std.zig.CrossTarget;
@@ -18,20 +18,21 @@ const OperatingSystem = @import("src/env.zig").OperatingSystem;
 
 const pathRel = fs.path.relative;
 
-/// Do not rename this constant. It is scanned by some scripts to determine which zig version to install.
-const recommended_zig_version = "0.13.0";
+/// When updating this, make sure to adjust SetupZig.cmake
+const recommended_zig_version = "0.14.0";
 
-comptime {
-    if (!std.mem.eql(u8, builtin.zig_version_string, recommended_zig_version)) {
-        @compileError(
-            "" ++
-                "Bun requires Zig version " ++ recommended_zig_version ++ ". This is" ++
-                "automatically configured via Bun's CMake setup. You likely meant to run" ++
-                "`bun setup`. If you are trying to upgrade the Zig compiler," ++
-                "run `./scripts/download-zig.sh master` or comment this message out.",
-        );
-    }
-}
+// comptime {
+//     if (!std.mem.eql(u8, builtin.zig_version_string, recommended_zig_version)) {
+//         @compileError(
+//             "" ++
+//                 "Bun requires Zig version " ++ recommended_zig_version ++ ", but you have " ++
+//                 builtin.zig_version_string ++ ". This is automatically configured via Bun's " ++
+//                 "CMake setup. You likely meant to run `bun run build`. If you are trying to " ++
+//                 "upgrade the Zig compiler, edit ZIG_COMMIT in cmake/tools/SetupZig.cmake or " ++
+//                 "comment this error out.",
+//         );
+//     }
+// }
 
 const zero_sha = "0000000000000000000000000000000000000000";
 
@@ -46,6 +47,7 @@ const BunBuildOptions = struct {
     sha: []const u8,
     /// enable debug logs in release builds
     enable_logs: bool = false,
+    enable_asan: bool,
     tracy_callstack_depth: u16,
     reported_nodejs_version: Version,
     /// To make iterating on some '@embedFile's faster, we load them at runtime
@@ -81,10 +83,7 @@ const BunBuildOptions = struct {
 
         var opts = b.addOptions();
         opts.addOption([]const u8, "base_path", b.pathFromRoot("."));
-        opts.addOption([]const u8, "codegen_path", std.fs.path.resolve(b.graph.arena, &.{
-            b.build_root.path.?,
-            this.codegen_path,
-        }) catch @panic("OOM"));
+        opts.addOption([]const u8, "codegen_path", std.fs.path.resolve(b.graph.arena, &.{ b.build_root.path.?, this.codegen_path }) catch @panic("OOM"));
 
         opts.addOption(bool, "codegen_embed", this.shouldEmbedCode());
         opts.addOption(u32, "canary_revision", this.canary_revision orelse 0);
@@ -94,6 +93,7 @@ const BunBuildOptions = struct {
         opts.addOption(bool, "baseline", this.isBaseline());
         opts.addOption(bool, "enable_logs", this.enable_logs);
         opts.addOption([]const u8, "reported_nodejs_version", b.fmt("{}", .{this.reported_nodejs_version}));
+        opts.addOption(bool, "zig_self_hosted_backend", this.no_llvm);
 
         const mod = opts.createModule();
         this.cached_options_module = mod;
@@ -154,15 +154,6 @@ pub fn build(b: *Build) !void {
     std.log.info("zig compiler v{s}", .{builtin.zig_version_string});
     checked_file_exists = std.AutoHashMap(u64, void).init(b.allocator);
 
-    b.zig_lib_dir = b.zig_lib_dir orelse b.path("vendor/zig/lib");
-
-    // TODO: Upgrade path for 0.14.0
-    // b.graph.zig_lib_directory = brk: {
-    //     const sub_path = "vendor/zig/lib";
-    //     const dir = try b.build_root.handle.openDir(sub_path, .{});
-    //     break :brk .{ .handle = dir, .path = try b.build_root.join(b.graph.arena, &.{sub_path}) };
-    // };
-
     var target_query = b.standardTargetOptionsQueryOnly(.{});
     const optimize = b.standardOptimizeOption(.{});
 
@@ -208,10 +199,7 @@ pub fn build(b: *Build) !void {
 
     const bun_version = b.option([]const u8, "version", "Value of `Bun.version`") orelse "0.0.0";
 
-    b.reference_trace = ref_trace: {
-        const trace = b.option(u32, "reference-trace", "Set the reference trace") orelse 16;
-        break :ref_trace if (trace == 0) null else trace;
-    };
+    b.reference_trace = b.reference_trace orelse 32;
 
     const obj_format = b.option(ObjectFormat, "obj_format", "Output file for object files") orelse .obj;
 
@@ -277,6 +265,7 @@ pub fn build(b: *Build) !void {
 
         .tracy_callstack_depth = b.option(u16, "tracy_callstack_depth", "") orelse 10,
         .enable_logs = b.option(bool, "enable_logs", "Enable logs in release") orelse false,
+        .enable_asan = b.option(bool, "enable_asan", "Enable asan") orelse false,
     };
 
     // zig build obj
@@ -287,6 +276,40 @@ pub fn build(b: *Build) !void {
         step.dependOn(addInstallObjectFile(b, bun_obj, "bun-zig", obj_format));
     }
 
+    // zig build test
+    {
+        var step = b.step("test", "Build Bun's unit test suite");
+        var o = build_options;
+        var unit_tests = b.addTest(.{
+            .name = "bun-test",
+            .optimize = build_options.optimize,
+            .root_source_file = b.path("src/unit_test.zig"),
+            .test_runner = .{ .path = b.path("src/main_test.zig"), .mode = .simple },
+            .target = build_options.target,
+            .use_llvm = !build_options.no_llvm,
+            .use_lld = if (build_options.os == .mac) false else !build_options.no_llvm,
+            .omit_frame_pointer = false,
+            .strip = false,
+        });
+        configureObj(b, &o, unit_tests);
+        // Setting `linker_allow_shlib_undefined` causes the linker to ignore
+        // all undefined symbols.  We want this because all we care about is the
+        // object file Zig creates; we perform our own linking later. There is
+        // currently no way to make a test build that only creates an object
+        // file w/o creating an executable.
+        //
+        // See: https://github.com/ziglang/zig/issues/23374
+        unit_tests.linker_allow_shlib_undefined = true;
+        unit_tests.link_function_sections = true;
+        unit_tests.link_data_sections = true;
+        unit_tests.bundle_ubsan_rt = false;
+
+        const bin = unit_tests.getEmittedBin();
+        const obj = bin.dirname().path(b, "bun-test.o");
+        const cpy_obj = b.addInstallFile(obj, "bun-test.o");
+        step.dependOn(&cpy_obj.step);
+    }
+
     // zig build windows-shim
     {
         var step = b.step("windows-shim", "Build the Windows shim (bun_shim_impl.exe + bun_shim_debug.exe)");
@@ -321,7 +344,21 @@ pub fn build(b: *Build) !void {
             .{ .os = .linux, .arch = .aarch64 },
             .{ .os = .linux, .arch = .x86_64, .musl = true },
             .{ .os = .linux, .arch = .aarch64, .musl = true },
-        });
+        }, &.{ .Debug, .ReleaseFast });
+    }
+
+    // zig build check-all-debug
+    {
+        const step = b.step("check-all-debug", "Check for semantic analysis errors on all supported platforms in debug mode");
+        addMultiCheck(b, step, build_options, &.{
+            .{ .os = .windows, .arch = .x86_64 },
+            .{ .os = .mac, .arch = .x86_64 },
+            .{ .os = .mac, .arch = .aarch64 },
+            .{ .os = .linux, .arch = .x86_64 },
+            .{ .os = .linux, .arch = .aarch64 },
+            .{ .os = .linux, .arch = .x86_64, .musl = true },
+            .{ .os = .linux, .arch = .aarch64, .musl = true },
+        }, &.{.Debug});
     }
 
     // zig build check-windows
@@ -329,13 +366,42 @@ pub fn build(b: *Build) !void {
         const step = b.step("check-windows", "Check for semantic analysis errors on Windows");
         addMultiCheck(b, step, build_options, &.{
             .{ .os = .windows, .arch = .x86_64 },
-        });
+        }, &.{ .Debug, .ReleaseFast });
+    }
+    {
+        const step = b.step("check-macos", "Check for semantic analysis errors on Windows");
+        addMultiCheck(b, step, build_options, &.{
+            .{ .os = .mac, .arch = .x86_64 },
+            .{ .os = .mac, .arch = .aarch64 },
+        }, &.{ .Debug, .ReleaseFast });
+    }
+    {
+        const step = b.step("check-linux", "Check for semantic analysis errors on Windows");
+        addMultiCheck(b, step, build_options, &.{
+            .{ .os = .linux, .arch = .x86_64 },
+            .{ .os = .linux, .arch = .aarch64 },
+        }, &.{ .Debug, .ReleaseFast });
     }
 
     // zig build translate-c-headers
     {
         const step = b.step("translate-c", "Copy generated translated-c-headers.zig to zig-out");
-        step.dependOn(&b.addInstallFile(getTranslateC(b, b.host, .Debug).getOutput(), "translated-c-headers.zig").step);
+        for ([_]TargetDescription{
+            .{ .os = .windows, .arch = .x86_64 },
+            .{ .os = .mac, .arch = .x86_64 },
+            .{ .os = .mac, .arch = .aarch64 },
+            .{ .os = .linux, .arch = .x86_64 },
+            .{ .os = .linux, .arch = .aarch64 },
+            .{ .os = .linux, .arch = .x86_64, .musl = true },
+            .{ .os = .linux, .arch = .aarch64, .musl = true },
+        }) |t| {
+            const resolved = t.resolveTarget(b);
+            step.dependOn(
+                &b.addInstallFile(getTranslateC(b, resolved, .Debug), b.fmt("translated-c-headers/{s}.zig", .{
+                    resolved.result.zigTriple(b.allocator) catch @panic("OOM"),
+                })).step,
+            );
+        }
     }
 
     // zig build enum-extractor
@@ -352,22 +418,32 @@ pub fn build(b: *Build) !void {
     }
 }
 
-pub fn addMultiCheck(
+const TargetDescription = struct {
+    os: OperatingSystem,
+    arch: Arch,
+    musl: bool = false,
+
+    fn resolveTarget(desc: TargetDescription, b: *Build) std.Build.ResolvedTarget {
+        return b.resolveTargetQuery(.{
+            .os_tag = OperatingSystem.stdOSTag(desc.os),
+            .cpu_arch = desc.arch,
+            .cpu_model = getCpuModel(desc.os, desc.arch) orelse .determined_by_arch_os,
+            .os_version_min = getOSVersionMin(desc.os),
+            .glibc_version = if (desc.musl) null else getOSGlibCVersion(desc.os),
+        });
+    }
+};
+
+fn addMultiCheck(
     b: *Build,
     parent_step: *Step,
     root_build_options: BunBuildOptions,
-    to_check: []const struct { os: OperatingSystem, arch: Arch, musl: bool = false },
+    to_check: []const TargetDescription,
+    optimize: []const std.builtin.OptimizeMode,
 ) void {
     for (to_check) |check| {
-        for ([_]std.builtin.Mode{ .Debug, .ReleaseFast }) |mode| {
-            const check_target = b.resolveTargetQuery(.{
-                .os_tag = OperatingSystem.stdOSTag(check.os),
-                .cpu_arch = check.arch,
-                .cpu_model = getCpuModel(check.os, check.arch) orelse .determined_by_cpu_arch,
-                .os_version_min = getOSVersionMin(check.os),
-                .glibc_version = if (check.musl) null else getOSGlibCVersion(check.os),
-            });
-
+        for (optimize) |mode| {
+            const check_target = check.resolveTarget(b);
             var options: BunBuildOptions = .{
                 .target = check_target,
                 .os = check.os,
@@ -381,6 +457,7 @@ pub fn addMultiCheck(
                 .reported_nodejs_version = root_build_options.reported_nodejs_version,
                 .codegen_path = root_build_options.codegen_path,
                 .no_llvm = root_build_options.no_llvm,
+                .enable_asan = root_build_options.enable_asan,
             };
 
             var obj = addBunObject(b, &options);
@@ -390,7 +467,13 @@ pub fn addMultiCheck(
     }
 }
 
-fn getTranslateC(b: *Build, target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode) *Step.TranslateC {
+fn getTranslateC(b: *Build, initial_target: std.Build.ResolvedTarget, optimize: std.builtin.OptimizeMode) LazyPath {
+    const target = b.resolveTargetQuery(q: {
+        var query = initial_target.query;
+        if (query.os_tag == .windows)
+            query.abi = .gnu;
+        break :q query;
+    });
     const translate_c = b.addTranslateC(.{
         .root_source_file = b.path("src/c-headers-for-zig.h"),
         .target = target,
@@ -406,31 +489,82 @@ fn getTranslateC(b: *Build, target: std.Build.ResolvedTarget, optimize: std.buil
         const str, const value = entry;
         translate_c.defineCMacroRaw(b.fmt("{s}={d}", .{ str, @intFromBool(value) }));
     }
-    return translate_c;
+
+    if (target.result.os.tag == .windows) {
+        // translate-c is unable to translate the unsuffixed windows functions
+        // like `SetCurrentDirectory` since they are defined with an odd macro
+        // that translate-c doesn't handle.
+        //
+        //     #define SetCurrentDirectory __MINGW_NAME_AW(SetCurrentDirectory)
+        //
+        // In these cases, it's better to just reference the underlying function
+        // directly: SetCurrentDirectoryW. To make the error better, a post
+        // processing step is applied to the translate-c file.
+        //
+        // Additionally, this step makes it so that decls like NTSTATUS and
+        // HANDLE point to the standard library structures.
+        const helper_exe = b.addExecutable(.{
+            .name = "process_windows_translate_c",
+            .root_module = b.createModule(.{
+                .root_source_file = b.path("src/codegen/process_windows_translate_c.zig"),
+                .target = b.graph.host,
+                .optimize = .Debug,
+            }),
+        });
+        const in = translate_c.getOutput();
+        const run = b.addRunArtifact(helper_exe);
+        run.addFileArg(in);
+        const out = run.addOutputFileArg("c-headers-for-zig.zig");
+        return out;
+    }
+    return translate_c.getOutput();
 }
 
 pub fn addBunObject(b: *Build, opts: *BunBuildOptions) *Compile {
-    const obj = b.addObject(.{
-        .name = if (opts.optimize == .Debug) "bun-debug" else "bun",
-        .root_source_file = switch (opts.os) {
-            .wasm => b.path("root_wasm.zig"),
-            else => b.path("root.zig"),
-            // else => b.path("root_css.zig"),
-        },
+    // Create `@import("bun")`, containing most of Bun's code.
+    const bun = b.createModule(.{
+        .root_source_file = b.path("src/bun.zig"),
+    });
+    bun.addImport("bun", bun); // allow circular "bun" import
+    addInternalImports(b, bun, opts);
+
+    const root = b.createModule(.{
+        .root_source_file = b.path("src/main.zig"),
+
+        // Root module gets compilation flags. Forwarded as default to dependencies.
         .target = opts.target,
         .optimize = opts.optimize,
-        .use_llvm = !opts.no_llvm,
-        .use_lld = if (opts.os == .mac) false else !opts.no_llvm,
-
-        // https://github.com/ziglang/zig/issues/17430
-        .pic = true,
-
-        .omit_frame_pointer = false,
-        .strip = false, // stripped at the end
     });
-    obj.bundle_compiler_rt = false;
-    obj.formatted_panics = true;
+    root.addImport("bun", bun);
+
+    const obj = b.addObject(.{
+        .name = if (opts.optimize == .Debug) "bun-debug" else "bun",
+        .root_module = root,
+    });
+    configureObj(b, opts, obj);
+    return obj;
+}
+
+fn configureObj(b: *Build, opts: *BunBuildOptions, obj: *Compile) void {
+    // Flags on root module get used for the compilation
     obj.root_module.omit_frame_pointer = false;
+    obj.root_module.strip = false; // stripped at the end
+    // https://github.com/ziglang/zig/issues/17430
+    obj.root_module.pic = true;
+
+    // Object options
+    obj.use_llvm = !opts.no_llvm;
+    obj.use_lld = if (opts.os == .mac) false else !opts.no_llvm;
+    if (opts.enable_asan) {
+        if (@hasField(Build.Module, "sanitize_address")) {
+            obj.root_module.sanitize_address = true;
+        } else {
+            const fail_step = b.addFail("asan is not supported on this platform");
+            obj.step.dependOn(&fail_step.step);
+        }
+    }
+    obj.bundle_compiler_rt = false;
+    obj.bundle_ubsan_rt = false;
 
     // Link libc
     if (opts.os != .wasm) {
@@ -440,6 +574,7 @@ pub fn addBunObject(b: *Build, opts: *BunBuildOptions) *Compile {
 
     // Disable stack probing on x86 so we don't need to include compiler_rt
     if (opts.arch.isX86()) {
+        // TODO: enable on debug please.
         obj.root_module.stack_check = false;
         obj.root_module.stack_protector = false;
     }
@@ -454,17 +589,18 @@ pub fn addBunObject(b: *Build, opts: *BunBuildOptions) *Compile {
             obj.root_module.valgrind = true;
         }
     }
-    addInternalPackages(b, obj, opts);
-    obj.root_module.addImport("build_options", opts.buildOptionsModule(b));
-
-    const translate_c = getTranslateC(b, opts.target, opts.optimize);
-    obj.root_module.addImport("translated-c-headers", translate_c.createModule());
-
-    return obj;
 }
 
 const ObjectFormat = enum {
+    /// Emitting LLVM bc files could allow a stronger LTO pass, however it
+    /// doesn't yet work. It is left accessible with `-Dobj_format=bc` or in
+    /// CMake with `-DZIG_OBJECT_FORMAT=bc`.
+    ///
+    /// To use LLVM bitcode from Zig, more work needs to be done. Currently, an install of
+    /// LLVM 18.1.7 does not compatible with what bitcode Zig 0.13 outputs (has LLVM 18.1.7)
+    /// Change to "bc" to experiment, "Invalid record" means it is not valid output.
     bc,
+    /// Emit a .o / .obj file for the bun-zig object.
     obj,
 };
 
@@ -494,18 +630,13 @@ fn exists(path: []const u8) bool {
     return true;
 }
 
-fn addInternalPackages(b: *Build, obj: *Compile, opts: *BunBuildOptions) void {
+fn addInternalImports(b: *Build, mod: *Module, opts: *BunBuildOptions) void {
     const os = opts.os;
 
-    const io_path = switch (os) {
-        .mac => "src/io/io_darwin.zig",
-        .linux => "src/io/io_linux.zig",
-        .windows => "src/io/io_windows.zig",
-        else => "src/io/io_stub.zig",
-    };
-    obj.root_module.addAnonymousImport("async_io", .{
-        .root_source_file = b.path(io_path),
-    });
+    mod.addImport("build_options", opts.buildOptionsModule(b));
+
+    const translate_c = getTranslateC(b, opts.target, opts.optimize);
+    mod.addImport("translated-c-headers", b.createModule(.{ .root_source_file = translate_c }));
 
     const zlib_internal_path = switch (os) {
         .windows => "src/deps/zlib.win32.zig",
@@ -513,7 +644,7 @@ fn addInternalPackages(b: *Build, obj: *Compile, opts: *BunBuildOptions) void {
         else => null,
     };
     if (zlib_internal_path) |path| {
-        obj.root_module.addAnonymousImport("zlib-internal", .{
+        mod.addAnonymousImport("zlib-internal", .{
             .root_source_file = b.path(path),
         });
     }
@@ -523,7 +654,7 @@ fn addInternalPackages(b: *Build, obj: *Compile, opts: *BunBuildOptions) void {
         .windows => "src/async/windows_event_loop.zig",
         else => "src/async/stub_event_loop.zig",
     };
-    obj.root_module.addAnonymousImport("async", .{
+    mod.addAnonymousImport("async", .{
         .root_source_file = b.path(async_path),
     });
 
@@ -539,6 +670,7 @@ fn addInternalPackages(b: *Build, obj: *Compile, opts: *BunBuildOptions) void {
         .{ .file = "bun-error/index.js", .enable = opts.shouldEmbedCode() },
         .{ .file = "bun-error/bun-error.css", .enable = opts.shouldEmbedCode() },
         .{ .file = "fallback-decoder.js", .enable = opts.shouldEmbedCode() },
+        .{ .file = "node-fallbacks/react-refresh.js", .enable = opts.shouldEmbedCode() },
         .{ .file = "node-fallbacks/assert.js", .enable = opts.shouldEmbedCode() },
         .{ .file = "node-fallbacks/buffer.js", .enable = opts.shouldEmbedCode() },
         .{ .file = "node-fallbacks/console.js", .enable = opts.shouldEmbedCode() },
@@ -570,17 +702,47 @@ fn addInternalPackages(b: *Build, obj: *Compile, opts: *BunBuildOptions) void {
                 entry.import
             else
                 entry.file;
-            obj.root_module.addAnonymousImport(import_path, .{
+            mod.addAnonymousImport(import_path, .{
                 .root_source_file = .{ .cwd_relative = path },
             });
         }
     }
+    inline for (.{
+        .{ .import = "completions-bash", .file = b.path("completions/bun.bash") },
+        .{ .import = "completions-zsh", .file = b.path("completions/bun.zsh") },
+        .{ .import = "completions-fish", .file = b.path("completions/bun.fish") },
+    }) |entry| {
+        mod.addAnonymousImport(entry.import, .{
+            .root_source_file = entry.file,
+        });
+    }
 
     if (os == .windows) {
-        obj.root_module.addAnonymousImport("bun_shim_impl.exe", .{
+        mod.addAnonymousImport("bun_shim_impl.exe", .{
             .root_source_file = opts.windowsShim(b).exe.getEmittedBin(),
         });
     }
+
+    // Finally, make it so all modules share the same import table.
+    propagateImports(mod) catch @panic("OOM");
+}
+
+/// Makes all imports of `source_mod` visible to all of its dependencies.
+/// Does not replace existing imports.
+fn propagateImports(source_mod: *Module) !void {
+    var seen = std.AutoHashMap(*Module, void).init(source_mod.owner.graph.arena);
+    defer seen.deinit();
+    var queue = std.ArrayList(*Module).init(source_mod.owner.graph.arena);
+    defer queue.deinit();
+    try queue.appendSlice(source_mod.import_table.values());
+    while (queue.pop()) |mod| {
+        if ((try seen.getOrPut(mod)).found_existing) continue;
+        try queue.appendSlice(mod.import_table.values());
+
+        for (source_mod.import_table.keys(), source_mod.import_table.values()) |k, v|
+            if (mod.import_table.get(k) == null)
+                mod.addImport(k, v);
+    }
 }
 
 fn validateGeneratedPath(path: []const u8) void {
@@ -609,30 +771,34 @@ const WindowsShim = struct {
 
         const exe = b.addExecutable(.{
             .name = "bun_shim_impl",
-            .root_source_file = path,
-            .target = target,
-            .optimize = .ReleaseFast,
+            .root_module = b.createModule(.{
+                .root_source_file = path,
+                .target = target,
+                .optimize = .ReleaseFast,
+                .unwind_tables = .none,
+                .omit_frame_pointer = true,
+                .strip = true,
+                .sanitize_thread = false,
+                .single_threaded = true,
+                .link_libc = false,
+            }),
+            .linkage = .static,
             .use_llvm = true,
             .use_lld = true,
-            .unwind_tables = false,
-            .omit_frame_pointer = true,
-            .strip = true,
-            .linkage = .static,
-            .sanitize_thread = false,
-            .single_threaded = true,
-            .link_libc = false,
         });
 
         const dbg = b.addExecutable(.{
             .name = "bun_shim_debug",
-            .root_source_file = path,
-            .target = target,
-            .optimize = .Debug,
+            .root_module = b.createModule(.{
+                .root_source_file = path,
+                .target = target,
+                .optimize = .Debug,
+                .single_threaded = true,
+                .link_libc = false,
+            }),
+            .linkage = .static,
             .use_llvm = true,
             .use_lld = true,
-            .linkage = .static,
-            .single_threaded = true,
-            .link_libc = false,
         });
 
         return .{ .exe = exe, .dbg = dbg };

bun.lock

@@ -1,5 +1,5 @@
 {
-  "lockfileVersion": 0,
+  "lockfileVersion": 1,
   "workspaces": {
     "": {
       "name": "bun",
@@ -29,7 +29,6 @@
       "name": "bun-types",
       "dependencies": {
         "@types/node": "*",
-        "@types/ws": "~8.5.10",
       },
       "devDependencies": {
         "@biomejs/biome": "^1.5.3",
@@ -151,13 +150,13 @@
 
     "@qiwi/npm-registry-client": ["@qiwi/npm-registry-client@8.9.1", "", { "dependencies": { "concat-stream": "^2.0.0", "graceful-fs": "^4.2.4", "normalize-package-data": "~1.0.1 || ^2.0.0 || ^3.0.0", "npm-package-arg": "^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0 || ^8.0.0", "once": "^1.4.0", "request": "^2.88.2", "retry": "^0.12.0", "safe-buffer": "^5.2.1", "semver": "2 >=2.2.1 || 3.x || 4 || 5 || 7", "slide": "^1.1.6", "ssri": "^8.0.0" }, "optionalDependencies": { "npmlog": "2 || ^3.1.0 || ^4.0.0" } }, "sha512-rZF+mG+NfijR0SHphhTLHRr4aM4gtfdwoAMY6we2VGQam8vkN1cxGG1Lg/Llrj8Dd0Mu6VjdFQRyMMRZxtZR2A=="],
 
-    "@types/bun": ["@types/bun@1.1.17", "", { "dependencies": { "bun-types": "1.1.44" } }, "sha512-zZt0Kao/8hAwNOXh4bmt8nKbMEd4QD8n7PeTGF+NZTVY5ouXhU/TX7jUj4He1p7mgY+WdplnU1B6MB1j17vdzg=="],
+    "@types/bun": ["@types/bun@1.2.2", "", { "dependencies": { "bun-types": "1.2.2" } }, "sha512-tr74gdku+AEDN5ergNiBnplr7hpDp3V1h7fqI2GcR/rsUaM39jpSeKH0TFibRvU0KwniRx5POgaYnaXbk0hU+w=="],
 
     "@types/json-schema": ["@types/json-schema@7.0.15", "", {}, "sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA=="],
 
     "@types/json5": ["@types/json5@0.0.29", "", {}, "sha512-dRLjCWHYg4oaA77cxO64oO+7JwCwnIzkZPdrrC71jQmQtlhM556pwKo5bUzqvZndkVbeFLIIi+9TC40JNF5hNQ=="],
 
-    "@types/node": ["@types/node@22.10.7", "", { "dependencies": { "undici-types": "~6.20.0" } }, "sha512-V09KvXxFiutGp6B7XkpaDXlNadZxrzajcY50EuoLIpQ6WWYCSvf19lVIazzfIzQvhUN2HjX12spLojTnhuKlGg=="],
+    "@types/node": ["@types/node@22.13.5", "", { "dependencies": { "undici-types": "~6.20.0" } }, "sha512-+lTU0PxZXn0Dr1NBtC7Y8cR21AJr87dLLU953CWA6pMxxv/UDc7jYAY90upcrie1nRcD6XNG5HOYEDtgW5TxAg=="],
 
     "@types/prop-types": ["@types/prop-types@15.7.12", "", {}, "sha512-5zvhXYtRNRluoE/jAp4GVsSduVUzNWKkOZrCDBWYtE7biZywwdC2AcEzg+cSMLFRfVgeAFqpfNabiPjxFddV1Q=="],
 
@@ -165,8 +164,6 @@
 
     "@types/semver": ["@types/semver@7.5.8", "", {}, "sha512-I8EUhyrgfLrcTkzV3TSsGyl1tSuPrEDzr0yd5m90UgNxQkyDXULk3b6MlQqTCpZpNtWe1K0hzclnZkTcLBe2UQ=="],
 
-    "@types/ws": ["@types/ws@8.5.11", "", { "dependencies": { "@types/node": "*" } }, "sha512-4+q7P5h3SpJxaBft0Dzpbr6lmMaqh0Jr2tbhJZ/luAwvD7ohSCniYkwz/pLxuT2h0EOa6QADgJj1Ko+TzRfZ+w=="],
-
     "@typescript-eslint/eslint-plugin": ["@typescript-eslint/eslint-plugin@7.16.1", "", { "dependencies": { "@eslint-community/regexpp": "^4.10.0", "@typescript-eslint/scope-manager": "7.16.1", "@typescript-eslint/type-utils": "7.16.1", "@typescript-eslint/utils": "7.16.1", "@typescript-eslint/visitor-keys": "7.16.1", "graphemer": "^1.4.0", "ignore": "^5.3.1", "natural-compare": "^1.4.0", "ts-api-utils": "^1.3.0" }, "peerDependencies": { "@typescript-eslint/parser": "^7.0.0", "eslint": "^8.56.0" } }, "sha512-SxdPak/5bO0EnGktV05+Hq8oatjAYVY3Zh2bye9pGZy6+jwyR3LG3YKkV4YatlsgqXP28BTeVm9pqwJM96vf2A=="],
 
     "@typescript-eslint/parser": ["@typescript-eslint/parser@7.16.1", "", { "dependencies": { "@typescript-eslint/scope-manager": "7.16.1", "@typescript-eslint/types": "7.16.1", "@typescript-eslint/typescript-estree": "7.16.1", "@typescript-eslint/visitor-keys": "7.16.1", "debug": "^4.3.4" }, "peerDependencies": { "eslint": "^8.56.0" } }, "sha512-u+1Qx86jfGQ5i4JjK33/FnawZRpsLxRnKzGE6EABZ40KxVT/vWsiZFEBBHjFOljmmV3MBYOHEKi0Jm9hbAOClA=="],
@@ -257,7 +254,7 @@
 
     "builtins": ["builtins@1.0.3", "", {}, "sha512-uYBjakWipfaO/bXI7E8rq6kpwHRZK5cNYrUv2OzZSI/FvmdMyXJ2tG9dKcjEC5YHmHpUAwsargWIZNWdxb/bnQ=="],
 
-    "bun-types": ["bun-types@workspace:packages/bun-types", { "dependencies": { "@types/node": "*", "@types/ws": "~8.5.10" }, "devDependencies": { "@biomejs/biome": "^1.5.3", "@definitelytyped/dtslint": "^0.0.199", "@definitelytyped/eslint-plugin": "^0.0.197", "typescript": "^5.0.2" } }],
+    "bun-types": ["bun-types@workspace:packages/bun-types"],
 
     "call-bind": ["call-bind@1.0.7", "", { "dependencies": { "es-define-property": "^1.0.0", "es-errors": "^1.3.0", "function-bind": "^1.1.2", "get-intrinsic": "^1.2.4", "set-function-length": "^1.2.1" } }, "sha512-GHTSNSYICQ7scH7sZ+M2rFopRoLh8t2bLSW6BbgrtLsahOIB5iyAVJf9GjWK3cYTDaMj4XdBpM1cA6pIS0Kv2w=="],
 
@@ -265,7 +262,7 @@
 
     "camel-case": ["camel-case@4.1.2", "", { "dependencies": { "pascal-case": "^3.1.2", "tslib": "^2.0.3" } }, "sha512-gxGWBrTT1JuMx6R+o5PTXMmUnhnVzLQ9SNutD4YqKtI6ap897t3tKECYla6gCWEkplXnlNybEkZg9GEGxKFCgw=="],
 
-    "caniuse-lite": ["caniuse-lite@1.0.30001653", "", {}, "sha512-XGWQVB8wFQ2+9NZwZ10GxTYC5hk0Fa+q8cSkr0tgvMhYhMHP/QC+WTgrePMDBWiWc/pV+1ik82Al20XOK25Gcw=="],
+    "caniuse-lite": ["caniuse-lite@1.0.30001695", "", {}, "sha512-vHyLade6wTgI2u1ec3WQBxv+2BrTERV28UXQu9LO6lZ9pYeMk34vjXFLOxo1A4UBA8XTL4njRQZdno/yYaSmWw=="],
 
     "capital-case": ["capital-case@1.0.4", "", { "dependencies": { "no-case": "^3.0.4", "tslib": "^2.0.3", "upper-case-first": "^2.0.2" } }, "sha512-ds37W8CytHgwnhGGTi88pcPyR15qoNkOpYwmMMfnWqqWgESapLqvDx6huFjQ5vqWSn2Z06173XNA7LtMOeUh1A=="],
 
@@ -915,18 +912,20 @@
 
     "@eslint-community/eslint-utils/eslint-visitor-keys": ["eslint-visitor-keys@3.4.3", "", {}, "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="],
 
-    "@types/ws/@types/node": ["@types/node@20.12.14", "", { "dependencies": { "undici-types": "~5.26.4" } }, "sha512-scnD59RpYD91xngrQQLGkE+6UrHUPzeKZWhhjBSa3HSkwjbQc38+q3RoIVEwxQGRw3M+j5hpNAM+lgV3cVormg=="],
-
     "@typescript-eslint/typescript-estree/minimatch": ["minimatch@9.0.5", "", { "dependencies": { "brace-expansion": "^2.0.1" } }, "sha512-G6T0ZX48xgozx7587koeX9Ys2NYy6Gmv//P89sEte9V9whIapMNF4idKxnW2QtCcLiTWlb/wfCabAtAFWhhBow=="],
 
     "@typescript-eslint/visitor-keys/eslint-visitor-keys": ["eslint-visitor-keys@3.4.3", "", {}, "sha512-wpc+LXeiyiisxPlEkUzU6svyS1frIO3Mgxj1fdy7Pm8Ygzguax2N3Fa/D/ag1WqbOprdI+uY6wMUl8/a2G+iag=="],
 
     "are-we-there-yet/readable-stream": ["readable-stream@2.3.8", "", { "dependencies": { "core-util-is": "~1.0.0", "inherits": "~2.0.3", "isarray": "~1.0.0", "process-nextick-args": "~2.0.0", "safe-buffer": "~5.1.1", "string_decoder": "~1.1.1", "util-deprecate": "~1.0.1" } }, "sha512-8p0AUk4XODgIewSi0l8Epjs+EVnWiK7NoDIEGU0HhE7+ZyY8D1IMY7odu5lRrFXGg71L15KG8QrPmum45RTtdA=="],
 
+    "autoprefixer/caniuse-lite": ["caniuse-lite@1.0.30001653", "", {}, "sha512-XGWQVB8wFQ2+9NZwZ10GxTYC5hk0Fa+q8cSkr0tgvMhYhMHP/QC+WTgrePMDBWiWc/pV+1ik82Al20XOK25Gcw=="],
+
     "babel-code-frame/chalk": ["chalk@1.1.3", "", { "dependencies": { "ansi-styles": "^2.2.1", "escape-string-regexp": "^1.0.2", "has-ansi": "^2.0.0", "strip-ansi": "^3.0.0", "supports-color": "^2.0.0" } }, "sha512-U3lRVLMSlsCfjqYPbLyVv11M9CPW4I728d6TCKMAOJueEeB9/8o+eSsMnxPJD+Q+K909sdESg7C+tIkoH6on1A=="],
 
     "babel-code-frame/js-tokens": ["js-tokens@3.0.2", "", {}, "sha512-RjTcuD4xjtthQkaWH7dFlH85L+QaVtSoOyGdZ3g6HFhS9dFNDfLyqgm2NFe2X6cQpeFmt0452FJjFG5UameExg=="],
 
+    "browserslist/caniuse-lite": ["caniuse-lite@1.0.30001653", "", {}, "sha512-XGWQVB8wFQ2+9NZwZ10GxTYC5hk0Fa+q8cSkr0tgvMhYhMHP/QC+WTgrePMDBWiWc/pV+1ik82Al20XOK25Gcw=="],
+
     "eslint-import-resolver-node/debug": ["debug@3.2.7", "", { "dependencies": { "ms": "^2.1.1" } }, "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ=="],
 
     "eslint-module-utils/debug": ["debug@3.2.7", "", { "dependencies": { "ms": "^2.1.1" } }, "sha512-CFjzYYAi4ThfiQvizrFQevTTXHtnCqWfe7x1AhgEscTz6ZbLbfoLRLPugTQyBth6f8ZERVUSyWHFD/7Wu4t1XQ=="],
@@ -1003,8 +1002,6 @@
 
     "@definitelytyped/utils/which/isexe": ["isexe@3.1.1", "", {}, "sha512-LpB/54B+/2J5hqQ7imZHfdU31OlgQqx7ZicVlkm9kzg9/w8GKLEcFfJl/t7DCEDueOyBAD6zCCwTO6Fzs0NoEQ=="],
 
-    "@types/ws/@types/node/undici-types": ["undici-types@5.26.5", "", {}, "sha512-JlCMO+ehdEIKqlFxk6IfVoAUVmgz7cU7zD/h9XZ0qzeosSHmUJVOzSQvvYSYWXkFXC+IfLKSIffhv0sVZup6pA=="],
-
     "@typescript-eslint/typescript-estree/minimatch/brace-expansion": ["brace-expansion@2.0.1", "", { "dependencies": { "balanced-match": "^1.0.0" } }, "sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA=="],
 
     "are-we-there-yet/readable-stream/isarray": ["isarray@1.0.0", "", {}, "sha512-VLghIWNM6ELQzo7zwmcg0NmTVyWKYjvIeM83yjp0wRDTmUnrM678fQbcKBo6n2CJEF0szoG//ytg+TKla89ALQ=="],

bunfig.node-test.toml

@@ -2,3 +2,7 @@
 # https://github.com/oven-sh/bun/issues/16289
 [test]
 preload = ["./test/js/node/harness.ts", "./test/preload.ts"]
+
+[install]
+# Node.js never auto-installs modules.
+auto = "disable"

ci/README.md

@@ -1,84 +0,0 @@
-# CI
-
-This directory contains scripts for building CI images for Bun.
-
-## Building
-
-### `macOS`
-
-On macOS, images are built using [`tart`](https://tart.run/), a tool that abstracts over the [`Virtualization.Framework`](https://developer.apple.com/documentation/virtualization) APIs, to run macOS VMs.
-
-To install the dependencies required, run:
-
-```sh
-$ cd ci
-$ bun run bootstrap
-```
-
-To build a vanilla macOS VM, run:
-
-```sh
-$ bun run build:darwin-aarch64-vanilla
-```
-
-This builds a vanilla macOS VM with the current macOS release on your machine. It runs scripts to disable things like spotlight and siri, but it does not install any software.
-
-> Note: The image size is 50GB, so make sure you have enough disk space.
-
-If you want to build a specific macOS release, you can run:
-
-```sh
-$ bun run build:darwin-aarch64-vanilla-15
-```
-
-> Note: You cannot build a newer release of macOS on an older macOS machine.
-
-To build a macOS VM with software installed to build and test Bun, run:
-
-```sh
-$ bun run build:darwin-aarch64
-```
-
-## Running
-
-### `macOS`
-
-## How To
-
-### Support a new macOS release
-
-1. Visit [`ipsw.me`](https://ipsw.me/VirtualMac2,1) and find the IPSW of the macOS release you want to build.
-
-2. Add an entry to [`ci/darwin/variables.pkr.hcl`](/ci/darwin/variables.pkr.hcl) with the following format:
-
-```hcl
-sonoma = {
-  distro  = "sonoma"
-  release = "15"
-  ipsw    = "https://updates.cdn-apple.com/..."
-}
-```
-
-3. Add matching scripts to [`ci/package.json`](/ci/package.json) to build the image, then test it:
-
-```sh
-$ bun run build:darwin-aarch64-vanilla-15
-```
-
-> Note: If you need to troubleshoot the build, you can remove the `headless = true` property from [`ci/darwin/image-vanilla.pkr.hcl`](/ci/darwin/image-vanilla.pkr.hcl) and the VM's screen will be displayed.
-
-4. Test and build the non-vanilla image:
-
-```sh
-$ bun run build:darwin-aarch64-15
-```
-
-This will use the vanilla image and run the [`scripts/bootstrap.sh`](/scripts/bootstrap.sh) script to install the required software to build and test Bun.
-
-5. Publish the images:
-
-```sh
-$ bun run login
-$ bun run publish:darwin-aarch64-vanilla-15
-$ bun run publish:darwin-aarch64-15
-```

ci/alpine/build.Dockerfile

@@ -1,22 +0,0 @@
-FROM alpine:edge AS build
-ARG GIT_SHA
-ENV GIT_SHA=${GIT_SHA}
-WORKDIR /app/bun
-ENV HOME=/root
-
-COPY . .
-RUN touch $HOME/.bashrc
-RUN ./scripts/bootstrap.sh
-RUN . $HOME/.bashrc && bun run build:release
-
-RUN apk add file
-RUN file ./build/release/bun
-RUN ldd ./build/release/bun
-RUN ./build/release/bun
-
-RUN cp -R /app/bun/build/* /output
-
-FROM scratch AS artifact
-COPY --from=build /output /
-
-# docker build -f ./ci/alpine/build.Dockerfile --progress=plain --build-arg GIT_SHA="$(git rev-parse HEAD)" --target=artifact --output type=local,dest=./build-alpine .

ci/alpine/test.Dockerfile

@@ -1,20 +0,0 @@
-FROM alpine:edge
-ENV HOME=/root
-WORKDIR /root
-COPY ./build-alpine/release/bun .
-COPY ./test ./test
-COPY ./scripts ./scripts
-COPY ./package.json ./package.json
-COPY ./packages ./packages
-
-RUN apk update
-RUN apk add nodejs lsb-release-minimal git python3 npm make g++
-RUN apk add file
-
-RUN file /root/bun
-RUN ldd /root/bun
-RUN /root/bun
-
-RUN ./scripts/runner.node.mjs --exec-path /root/bun
-
-# docker build -f ./ci/alpine/test.Dockerfile --progress=plain .

ci/darwin/image-vanilla.pkr.hcl

@@ -1,46 +0,0 @@
-# Generates a vanilla macOS VM with optimized settings for virtualized environments.
-# See login.sh and optimize.sh for details.
-
-data "external-raw" "boot-script" {
-  program = ["sh", "-c", templatefile("scripts/boot-image.sh", var)]
-}
-
-source "tart-cli" "bun-darwin-aarch64-vanilla" {
-  vm_name      = "bun-darwin-aarch64-vanilla-${local.release.distro}-${local.release.release}"
-  from_ipsw    = local.release.ipsw
-  cpu_count    = local.cpu_count
-  memory_gb    = local.memory_gb
-  disk_size_gb = local.disk_size_gb
-  ssh_username = local.username
-  ssh_password = local.password
-  ssh_timeout  = "120s"
-  create_grace_time = "30s"
-  boot_command = split("\n", data.external-raw.boot-script.result)
-  headless     = true # Disable if you need to debug why the boot_command is not working
-}
-
-build {
-  sources = ["source.tart-cli.bun-darwin-aarch64-vanilla"]
-
-  provisioner "file" {
-    content = file("scripts/setup-login.sh")
-    destination = "/tmp/setup-login.sh"
-  }
-
-  provisioner "shell" {
-    inline = ["echo \"${local.password}\" | sudo -S sh -c 'sh /tmp/setup-login.sh \"${local.username}\" \"${local.password}\"'"]
-  }
-
-  provisioner "file" {
-    content = file("scripts/optimize-machine.sh")
-    destination = "/tmp/optimize-machine.sh"
-  }
-
-  provisioner "shell" {
-    inline = ["sudo sh /tmp/optimize-machine.sh"]
-  }
-
-  provisioner "shell" {
-    inline = ["sudo rm -rf /tmp/*"]
-  }
-}

ci/darwin/image.pkr.hcl

@@ -1,44 +0,0 @@
-# Generates a macOS VM with software installed to build and test Bun.
-
-source "tart-cli" "bun-darwin-aarch64" {
-  vm_name      = "bun-darwin-aarch64-${local.release.distro}-${local.release.release}"
-  vm_base_name = "bun-darwin-aarch64-vanilla-${local.release.distro}-${local.release.release}"
-  cpu_count    = local.cpu_count
-  memory_gb    = local.memory_gb
-  disk_size_gb = local.disk_size_gb
-  ssh_username = local.username
-  ssh_password = local.password
-  ssh_timeout  = "120s"
-  headless     = true
-}
-
-build {
-  sources = ["source.tart-cli.bun-darwin-aarch64"]
-
-  provisioner "file" {
-    content = file("../../scripts/bootstrap.sh")
-    destination = "/tmp/bootstrap.sh"
-  }
-
-  provisioner "shell" {
-    inline = ["CI=true sh /tmp/bootstrap.sh"]
-  }
-
-  provisioner "file" {
-    source = "darwin/plists/"
-    destination = "/tmp/"
-  }
-
-  provisioner "shell" {
-    inline = [
-      "sudo ls /tmp/",
-      "sudo mv /tmp/*.plist /Library/LaunchDaemons/",
-      "sudo chown root:wheel /Library/LaunchDaemons/*.plist",
-      "sudo chmod 644 /Library/LaunchDaemons/*.plist",
-    ]
-  }
-
-  provisioner "shell" {
-    inline = ["sudo rm -rf /tmp/*"]
-  }
-}

ci/darwin/plists/buildkite-agent.plist

@@ -1,44 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-  <dict>
-    <key>Label</key>
-    <string>com.buildkite.buildkite-agent</string>
-
-    <key>ProgramArguments</key>
-    <array>
-      <string>/usr/local/bin/buildkite-agent</string>
-      <string>start</string>
-    </array>
-
-    <key>KeepAlive</key>
-    <dict>
-      <key>SuccessfulExit</key>
-      <false />
-    </dict>
-
-    <key>RunAtLoad</key>
-    <true />
-
-    <key>StandardOutPath</key>
-    <string>/var/buildkite-agent/logs/buildkite-agent.log</string>
-
-    <key>StandardErrorPath</key>
-    <string>/var/buildkite-agent/logs/buildkite-agent.log</string>
-
-    <key>EnvironmentVariables</key>
-    <dict>
-      <key>BUILDKITE_AGENT_CONFIG</key>
-      <string>/etc/buildkite-agent/buildkite-agent.cfg</string>
-    </dict>
-
-    <key>LimitLoadToSessionType</key>
-    <array>
-      <string>Aqua</string>
-      <string>LoginWindow</string>
-      <string>Background</string>
-      <string>StandardIO</string>
-      <string>System</string>
-    </array>
-  </dict>
-</plist>

ci/darwin/plists/tailscale.plist

@@ -1,20 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-  <dict>
-    <key>Label</key>
-    <string>com.tailscale.tailscaled</string>
-
-    <key>ProgramArguments</key>
-    <array>
-      <string>/usr/local/bin/tailscale</string>
-      <string>up</string>
-      <string>--ssh</string>
-      <string>--authkey</string>
-      <string>${TAILSCALE_AUTHKEY}</string>
-    </array>
-
-    <key>RunAtLoad</key>
-    <true />
-  </dict>
-</plist>

ci/darwin/plists/tailscaled.plist

@@ -1,16 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
-<plist version="1.0">
-  <dict>
-    <key>Label</key>
-    <string>com.tailscale.tailscaled</string>
-
-    <key>ProgramArguments</key>
-    <array>
-      <string>/usr/local/bin/tailscaled</string>
-    </array>
-
-    <key>RunAtLoad</key>
-    <true />
-  </dict>
-</plist>

ci/darwin/scripts/boot-image.sh

@@ -1,124 +0,0 @@
-#!/bin/sh
-
-# This script generates the boot commands for the macOS installer GUI.
-# It is run on your local machine, not inside the VM.
-
-# Sources:
-# - https://github.com/cirruslabs/macos-image-templates/blob/master/templates/vanilla-sequoia.pkr.hcl
-
-if ! [ "${release}" ] || ! [ "${username}" ] || ! [ "${password}" ]; then
-  echo "Script must be run with variables: release, username, and password" >&2
-  exit 1
-fi
-
-# Hello, hola, bonjour, etc.
-echo "<wait120s><spacebar>"
-
-# Select Your Country and Region
-echo "<wait30s>italiano<esc>english<enter>"
-echo "<wait30s>united states<leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Written and Spoken Languages
-echo "<wait30s><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Accessibility
-echo "<wait30s><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Data & Privacy
-echo "<wait30s><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Migration Assistant
-echo "<wait30s><tab><tab><tab><spacebar>"
-
-# Sign In with Your Apple ID
-echo "<wait30s><leftShiftOn><tab><leftShiftOff><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Are you sure you want to skip signing in with an Apple ID?
-echo "<wait30s><tab><spacebar>"
-
-# Terms and Conditions
-echo "<wait30s><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# I have read and agree to the macOS Software License Agreement
-echo "<wait30s><tab><spacebar>"
-
-# Create a Computer Account
-echo "<wait30s>${username}<tab><tab>${password}<tab>${password}<tab><tab><tab><spacebar>"
-
-# Enable Location Services
-echo "<wait60s><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Are you sure you don't want to use Location Services?
-echo "<wait30s><tab><spacebar>"
-
-# Select Your Time Zone
-echo "<wait30s><tab>UTC<enter><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Analytics
-echo "<wait30s><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Screen Time
-echo "<wait30s><tab><spacebar>"
-
-# Siri
-echo "<wait30s><tab><spacebar><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-# Choose Your Look
-echo "<wait30s><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-if [ "${release}" = "13" ] || [ "${release}" = "14" ]; then
-  # Enable Voice Over
-  echo "<wait30s><leftAltOn><f5><leftAltOff><wait5s>v"
-else
-  # Welcome to Mac
-  echo "<wait30s><spacebar>"
-
-  # Enable Keyboard navigation
-  echo "<wait30s><leftAltOn><spacebar><leftAltOff>Terminal<enter>"
-  echo "<wait30s>defaults write NSGlobalDomain AppleKeyboardUIMode -int 3<enter>"
-  echo "<wait30s><leftAltOn>q<leftAltOff>"
-fi
-
-# Now that the installation is done, open "System Settings"
-echo "<wait30s><leftAltOn><spacebar><leftAltOff>System Settings<enter>"
-
-# Navigate to "Sharing"
-echo "<wait30s><leftAltOn>f<leftAltOff>sharing<enter>"
-
-if [ "${release}" = "13" ]; then
-  # Navigate to "Screen Sharing" and enable it
-  echo "<wait30s><tab><down><spacebar>"
-
-  # Navigate to "Remote Login" and enable it
-  echo "<wait30s><tab><tab><tab><tab><tab><tab><spacebar>"
-
-  # Open "Remote Login" details
-  echo "<wait30s><tab><spacebar>"
-
-  # Enable "Full Disk Access"
-  echo "<wait30s><tab><spacebar>"
-
-  # Click "Done"
-  echo "<wait30s><leftShiftOn><tab><leftShiftOff><leftShiftOn><tab><leftShiftOff><spacebar>"
-
-  # Disable Voice Over
-  echo "<leftAltOn><f5><leftAltOff>"
-elif [ "${release}" = "14" ]; then
-  # Navigate to "Screen Sharing" and enable it
-  echo "<wait30s><tab><tab><tab><tab><tab><spacebar>"
-
-  # Navigate to "Remote Login" and enable it
-  echo "<wait30s><tab><tab><tab><tab><tab><tab><tab><tab><tab><tab><tab><tab><spacebar>"
-
-  # Disable Voice Over
-  echo "<wait30s><leftAltOn><f5><leftAltOff>"
-elif [ "${release}" = "15" ]; then  
-  # Navigate to "Screen Sharing" and enable it
-  echo "<wait30s><tab><tab><tab><tab><tab><spacebar>"
-
-  # Navigate to "Remote Login" and enable it
-  echo "<wait30s><tab><tab><tab><tab><tab><tab><tab><tab><tab><tab><tab><tab><spacebar>"
-fi
-
-# Quit System Settings
-echo "<wait30s><leftAltOn>q<leftAltOff>"

ci/darwin/scripts/optimize-machine.sh

@@ -1,122 +0,0 @@
-#!/bin/sh
-
-# This script optimizes macOS for virtualized environments.
-# It disables things like spotlight, screen saver, and sleep.
-
-# Sources:
-# - https://github.com/sickcodes/osx-optimizer
-# - https://github.com/koding88/MacBook-Optimization-Script
-# - https://www.macstadium.com/blog/simple-optimizations-for-macos-and-ios-build-agents
-
-if [ "$(id -u)" != "0" ]; then
-  echo "This script must be run using sudo." >&2
-  exit 1
-fi
-
-execute() {
-  echo "$ $@" >&2
-  if ! "$@"; then
-    echo "Command failed: $@" >&2
-    exit 1
-  fi
-}
-
-disable_software_update() {
-  execute softwareupdate --schedule off
-  execute defaults write com.apple.SoftwareUpdate AutomaticDownload -bool false
-  execute defaults write com.apple.SoftwareUpdate AutomaticCheckEnabled -bool false
-  execute defaults write com.apple.SoftwareUpdate ConfigDataInstall -int 0
-  execute defaults write com.apple.SoftwareUpdate CriticalUpdateInstall -int 0
-  execute defaults write com.apple.SoftwareUpdate ScheduleFrequency -int 0
-  execute defaults write com.apple.SoftwareUpdate AutomaticDownload -int 0
-  execute defaults write com.apple.commerce AutoUpdate -bool false
-  execute defaults write com.apple.commerce AutoUpdateRestartRequired -bool false
-}
-
-disable_spotlight() {
-  execute mdutil -i off -a
-  execute mdutil -E /
-}
-
-disable_siri() {
-  execute launchctl unload -w /System/Library/LaunchAgents/com.apple.Siri.agent.plist
-  execute defaults write com.apple.Siri StatusMenuVisible -bool false
-  execute defaults write com.apple.Siri UserHasDeclinedEnable -bool true
-  execute defaults write com.apple.assistant.support "Assistant Enabled" 0
-}
-
-disable_sleep() {
-  execute systemsetup -setsleep Never
-  execute systemsetup -setcomputersleep Never
-  execute systemsetup -setdisplaysleep Never
-  execute systemsetup -setharddisksleep Never
-}
-
-disable_screen_saver() {
-  execute defaults write com.apple.screensaver loginWindowIdleTime 0
-  execute defaults write com.apple.screensaver idleTime 0
-}
-
-disable_screen_lock() {
-  execute defaults write com.apple.loginwindow DisableScreenLock -bool true
-}
-
-disable_wallpaper() {
-  execute defaults write com.apple.loginwindow DesktopPicture ""
-}
-
-disable_application_state() {
-  execute defaults write com.apple.loginwindow TALLogoutSavesState -bool false
-}
-
-disable_accessibility() {
-  execute defaults write com.apple.Accessibility DifferentiateWithoutColor -int 1
-  execute defaults write com.apple.Accessibility ReduceMotionEnabled -int 1
-  execute defaults write com.apple.universalaccess reduceMotion -int 1
-  execute defaults write com.apple.universalaccess reduceTransparency -int 1
-}
-
-disable_dashboard() {
-  execute defaults write com.apple.dashboard mcx-disabled -boolean YES
-  execute killall Dock
-}
-
-disable_animations() {
-  execute defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false
-  execute defaults write -g QLPanelAnimationDuration -float 0
-  execute defaults write com.apple.finder DisableAllAnimations -bool true
-}
-
-disable_time_machine() {
-  execute tmutil disable
-}
-
-enable_performance_mode() {
-  # https://support.apple.com/en-us/101992
-  if ! [ $(nvram boot-args 2>/dev/null | grep -q serverperfmode) ]; then
-    execute nvram boot-args="serverperfmode=1 $(nvram boot-args 2>/dev/null | cut -f 2-)"
-  fi
-}
-
-add_terminal_to_desktop() {
-  execute ln -sf /System/Applications/Utilities/Terminal.app ~/Desktop/Terminal
-}
-
-main() {
-  disable_software_update
-  disable_spotlight
-  disable_siri
-  disable_sleep
-  disable_screen_saver
-  disable_screen_lock
-  disable_wallpaper
-  disable_application_state
-  disable_accessibility
-  disable_dashboard
-  disable_animations
-  disable_time_machine
-  enable_performance_mode
-  add_terminal_to_desktop
-}
-
-main

ci/darwin/scripts/setup-login.sh

@@ -1,78 +0,0 @@
-#!/bin/sh
-
-# This script generates a /etc/kcpassword file to enable auto-login on macOS.
-# Yes, this stores your password in plain text. Do NOT do this on your local machine.
-
-# Sources:
-# - https://github.com/xfreebird/kcpassword/blob/master/kcpassword
-
-if [ "$(id -u)" != "0" ]; then
-  echo "This script must be run using sudo." >&2
-  exit 1
-fi
-
-execute() {
-  echo "$ $@" >&2
-  if ! "$@"; then
-    echo "Command failed: $@" >&2
-    exit 1
-  fi
-}
-
-kcpassword() {
-  passwd="$1"
-  key="7d 89 52 23 d2 bc dd ea a3 b9 1f"
-  passwd_hex=$(printf "%s" "$passwd" | xxd -p | tr -d '\n')
-  
-  key_len=33
-  passwd_len=${#passwd_hex}
-  remainder=$((passwd_len % key_len))
-  if [ $remainder -ne 0 ]; then
-    padding=$((key_len - remainder))
-    passwd_hex="${passwd_hex}$(printf '%0*x' $((padding / 2)) 0)"
-  fi
-
-  result=""
-  i=0
-  while [ $i -lt ${#passwd_hex} ]; do
-    for byte in $key; do
-      [ $i -ge ${#passwd_hex} ] && break
-      p="${passwd_hex:$i:2}"
-      r=$(printf '%02x' $((0x$p ^ 0x$byte)))
-      result="${result}${r}"
-      i=$((i + 2))
-    done
-  done
-
-  echo "$result"
-}
-
-login() {
-  username="$1"
-  password="$2"
-
-  enable_passwordless_sudo() {
-    execute mkdir -p /etc/sudoers.d/
-    echo "${username} ALL=(ALL) NOPASSWD: ALL" | EDITOR=tee execute visudo "/etc/sudoers.d/${username}-nopasswd"
-  }
-
-  enable_auto_login() {
-    echo "00000000: 1ced 3f4a bcbc ba2c caca 4e82" | execute xxd -r - /etc/kcpassword
-    execute defaults write /Library/Preferences/com.apple.loginwindow autoLoginUser "${username}"
-  }
-
-  disable_screen_lock() {
-    execute sysadminctl -screenLock off -password "${password}"
-  }
-
-  enable_passwordless_sudo
-  enable_auto_login
-  disable_screen_lock
-}
-
-if [ $# -ne 2 ]; then
-  echo "Usage: $0 <username> <password>" >&2
-  exit 1
-fi
-
-login "$@"

ci/darwin/variables.pkr.hcl

@@ -1,78 +0,0 @@
-packer {
-  required_plugins {
-    tart = {
-      version = ">= 1.12.0"
-      source  = "github.com/cirruslabs/tart"
-    }
-    external = {
-      version = ">= 0.0.2"
-      source  = "github.com/joomcode/external"
-    }
-  }
-}
-
-variable "release" {
-  type    = number
-  default = 13
-}
-
-variable "username" {
-  type    = string
-  default = "admin"
-}
-
-variable "password" {
-  type    = string
-  default = "admin"
-}
-
-variable "cpu_count" {
-  type    = number
-  default = 2
-}
-
-variable "memory_gb" {
-  type    = number
-  default = 4
-}
-
-variable "disk_size_gb" {
-  type    = number
-  default = 50
-}
-
-locals {
-  sequoia = {
-    tier    = 1
-    distro  = "sequoia"
-    release = "15"
-    ipsw    = "https://updates.cdn-apple.com/2024FallFCS/fullrestores/062-78489/BDA44327-C79E-4608-A7E0-455A7E91911F/UniversalMac_15.0_24A335_Restore.ipsw"
-  }
-
-  sonoma = {
-    tier    = 2
-    distro  = "sonoma"
-    release = "14"
-    ipsw    = "https://updates.cdn-apple.com/2023FallFCS/fullrestores/042-54934/0E101AD6-3117-4B63-9BF1-143B6DB9270A/UniversalMac_14.0_23A344_Restore.ipsw"
-  }
-
-  ventura = {
-    tier    = 2
-    distro  = "ventura"
-    release = "13"
-    ipsw    = "https://updates.cdn-apple.com/2022FallFCS/fullrestores/012-92188/2C38BCD1-2BFF-4A10-B358-94E8E28BE805/UniversalMac_13.0_22A380_Restore.ipsw"
-  }
-
-  releases = {
-    15 = local.sequoia
-    14 = local.sonoma
-    13 = local.ventura
-  }
-
-  release      = local.releases[var.release]
-  username     = var.username
-  password     = var.password
-  cpu_count    = var.cpu_count
-  memory_gb    = var.memory_gb
-  disk_size_gb = var.disk_size_gb
-}

ci/linux/Dockerfile

@@ -1,18 +0,0 @@
-ARG IMAGE=debian:11
-FROM $IMAGE
-COPY ./scripts/bootstrap.sh /tmp/bootstrap.sh
-ENV CI=true
-RUN sh /tmp/bootstrap.sh && rm -rf /tmp/*
-WORKDIR /workspace/bun
-COPY bunfig.toml bunfig.toml
-COPY package.json package.json
-COPY CMakeLists.txt CMakeLists.txt
-COPY cmake/ cmake/
-COPY scripts/ scripts/
-COPY patches/ patches/
-COPY *.zig ./
-COPY src/ src/
-COPY packages/ packages/
-COPY test/ test/
-RUN bun i
-RUN bun run build:ci

ci/linux/scripts/set-hostname.sh

@@ -1,27 +0,0 @@
-#!/bin/sh
-
-# This script sets the hostname of the current machine.
-
-execute() {
-  echo "$ $@" >&2
-  if ! "$@"; then
-    echo "Command failed: $@" >&2
-    exit 1
-  fi
-}
-
-main() {
-  if [ "$#" -ne 1 ]; then
-    echo "Usage: $0 <hostname>" >&2
-    exit 1
-  fi
-
-  if [ -f "$(which hostnamectl)" ]; then
-    execute hostnamectl set-hostname "$1"
-  else
-    echo "Error: hostnamectl is not installed." >&2
-    exit 1
-  fi
-}
-
-main "$@"

ci/linux/scripts/start-tailscale.sh

@@ -1,22 +0,0 @@
-#!/bin/sh
-
-# This script starts tailscale on the current machine.
-
-execute() {
-  echo "$ $@" >&2
-  if ! "$@"; then
-    echo "Command failed: $@" >&2
-    exit 1
-  fi
-}
-
-main() {
-  if [ "$#" -ne 1 ]; then
-    echo "Usage: $0 <auth-key>" >&2
-    exit 1
-  fi
-
-  execute tailscale up --reset --ssh --accept-risk=lose-ssh --auth-key="$1"
-}
-
-main "$@"

ci/package.json

@@ -1,27 +0,0 @@
-{
-  "private": true,
-  "scripts": {
-    "bootstrap": "brew install gh jq cirruslabs/cli/tart cirruslabs/cli/sshpass hashicorp/tap/packer && packer init darwin",
-    "login": "token=$(gh auth token); username=$(gh api user --jq .login); echo \"Login as $username...\"; echo \"$token\" | tart login ghcr.io --username \"$username\" --password-stdin; echo \"$token\" | docker login ghcr.io --username \"$username\" --password-stdin",
-    "fetch:image-name": "echo ghcr.io/oven-sh/bun-vm",
-    "fetch:darwin-version": "echo 1",
-    "fetch:macos-version": "sw_vers -productVersion | cut -d. -f1",
-    "fetch:script-version": "cat ../scripts/bootstrap.sh | grep 'v=' | sed 's/v=\"//;s/\"//' | head -n 1",
-    "build:darwin-aarch64-vanilla": "packer build '-only=*.bun-darwin-aarch64-vanilla' -var release=$(bun fetch:macos-version) darwin/",
-    "build:darwin-aarch64-vanilla-15": "packer build '-only=*.bun-darwin-aarch64-vanilla' -var release=15 darwin/",
-    "build:darwin-aarch64-vanilla-14": "packer build '-only=*.bun-darwin-aarch64-vanilla' -var release=14 darwin/",
-    "build:darwin-aarch64-vanilla-13": "packer build '-only=*.bun-darwin-aarch64-vanilla' -var release=13 darwin/",
-    "build:darwin-aarch64": "packer build '-only=*.bun-darwin-aarch64' -var release=$(bun fetch:macos-version) darwin/",
-    "build:darwin-aarch64-15": "packer build '-only=*.bun-darwin-aarch64' -var release=15 darwin/",
-    "build:darwin-aarch64-14": "packer build '-only=*.bun-darwin-aarch64' -var release=14 darwin/",
-    "build:darwin-aarch64-13": "packer build '-only=*.bun-darwin-aarch64' -var release=13 darwin/",
-    "publish:darwin-aarch64-vanilla": "image=$(tart list --format json | jq -r \".[] | select(.Name | test(\\\"^bun-darwin-aarch64-vanilla-.*-$(bun fetch:macos-version)$\\\")) | .Name\" | head -n 1 | sed 's/bun-//'); tart push \"bun-$image\" \"ghcr.io/oven-sh/bun-vm:$image-v$(bun fetch:darwin-version)\"",
-    "publish:darwin-aarch64-vanilla-15": "tart push bun-darwin-aarch64-vanilla-sequoia-15 \"$(bun fetch:image-name):darwin-aarch64-vanilla-sequoia-15-v$(bun fetch:darwin-version)\"",
-    "publish:darwin-aarch64-vanilla-14": "tart push bun-darwin-aarch64-vanilla-sonoma-14 \"$(bun fetch:image-name):darwin-aarch64-vanilla-sonoma-14-v$(bun fetch:darwin-version)\"",
-    "publish:darwin-aarch64-vanilla-13": "tart push bun-darwin-aarch64-vanilla-ventura-13 \"$(bun fetch:image-name):darwin-aarch64-vanilla-ventura-13-v$(bun fetch:darwin-version)\"",
-    "publish:darwin-aarch64": "image=$(tart list --format json | jq -r \".[] | select(.Name | test(\\\"^bun-darwin-aarch64-.*-$(bun fetch:macos-version)$\\\")) | .Name\" | head -n 1 | sed 's/bun-//'); tart push \"bun-$image\" \"ghcr.io/oven-sh/bun-vm:$image-v$(bun fetch:script-version)\"",
-    "publish:darwin-aarch64-15": "tart push bun-darwin-aarch64-sequoia-15 \"$(bun fetch:image-name):darwin-aarch64-sequoia-15-v$(bun fetch:script-version)\"",
-    "publish:darwin-aarch64-14": "tart push bun-darwin-aarch64-sonoma-14 \"$(bun fetch:image-name):darwin-aarch64-sonoma-14-v$(bun fetch:script-version)\"",
-    "publish:darwin-aarch64-13": "tart push bun-darwin-aarch64-ventura-13 \"$(bun fetch:image-name):darwin-aarch64-ventura-13-v$(bun fetch:script-version)\""
-  }
-}

cmake/CompilerFlags.cmake

@@ -44,6 +44,13 @@ if(WIN32)
   )
 endif()
 
+if(ENABLE_ASAN)
+  register_compiler_flags(
+    DESCRIPTION "Enable AddressSanitizer"
+    -fsanitize=address
+  )
+endif()
+
 # --- Optimization level ---
 if(DEBUG)
   register_compiler_flags(
@@ -135,6 +142,14 @@ if(UNIX)
     -fno-unwind-tables
     -fno-asynchronous-unwind-tables
   )
+
+  # needed for libuv stubs because they use
+  # C23 feature which lets you define parameter without
+  # name
+  register_compiler_flags(
+    DESCRIPTION "Allow C23 extensions"
+    -Wno-c23-extensions
+  )
 endif()
 
 register_compiler_flags(

cmake/Globals.cmake

@@ -419,7 +419,15 @@ function(register_command)
     list(APPEND CMD_EFFECTIVE_OUTPUTS ${artifact})
     if(BUILDKITE)
       file(RELATIVE_PATH filename ${BUILD_PATH} ${artifact})
-      list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} buildkite-agent artifact upload ${filename})
+      if(filename STREQUAL "libbun-profile.a")
+        # libbun-profile.a is now over 5gb in size, compress it first
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} rm -r ${BUILD_PATH}/codegen)
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} rm -r ${CACHE_PATH})
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} gzip -1 libbun-profile.a)
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} buildkite-agent artifact upload libbun-profile.a.gz)
+      else()
+        list(APPEND CMD_COMMANDS COMMAND ${CMAKE_COMMAND} -E chdir ${BUILD_PATH} buildkite-agent artifact upload ${filename})
+      endif()
     endif()
   endforeach()
 
@@ -625,7 +633,7 @@ function(register_repository)
     set(GIT_PATH ${VENDOR_PATH}/${GIT_NAME})
   endif()
 
-  set(GIT_EFFECTIVE_OUTPUTS)
+  set(GIT_EFFECTIVE_OUTPUTS ${GIT_PATH}/.ref)
   foreach(output ${GIT_OUTPUTS})
     list(APPEND GIT_EFFECTIVE_OUTPUTS ${GIT_PATH}/${output})
   endforeach()
@@ -743,11 +751,17 @@ function(register_cmake_command)
     list(APPEND MAKE_EFFECTIVE_ARGS --fresh)
   endif()
 
+  set(MAKE_SOURCES)
+  if(TARGET clone-${MAKE_TARGET})
+    list(APPEND MAKE_SOURCES ${MAKE_CWD}/.ref)
+  endif()
+
   register_command(
     COMMENT "Configuring ${MAKE_TARGET}"
     TARGET configure-${MAKE_TARGET}
     COMMAND ${CMAKE_COMMAND} ${MAKE_EFFECTIVE_ARGS}
     CWD ${MAKE_CWD}
+    SOURCES ${MAKE_SOURCES}
     OUTPUTS ${MAKE_BUILD_PATH}/CMakeCache.txt
   )
 
@@ -799,6 +813,7 @@ function(register_cmake_command)
     TARGETS configure-${MAKE_TARGET}
     COMMAND ${CMAKE_COMMAND} ${MAKE_BUILD_ARGS}
     CWD ${MAKE_CWD}
+    SOURCES ${MAKE_SOURCES}
     ARTIFACTS ${MAKE_ARTIFACTS}
   )
 

cmake/Options.cmake

@@ -26,6 +26,15 @@ else()
   setx(DEBUG OFF)
 endif()
 
+optionx(BUN_TEST BOOL "Build Bun's unit test suite instead of the normal build" DEFAULT OFF)
+
+if (BUN_TEST)
+  setx(TEST ON)
+else()
+  setx(TEST OFF)
+endif()
+
+
 if(CMAKE_BUILD_TYPE MATCHES "MinSizeRel")
   setx(ENABLE_SMOL ON)
 endif()
@@ -62,7 +71,14 @@ if(ARCH STREQUAL "x64")
   optionx(ENABLE_BASELINE BOOL "If baseline features should be used for older CPUs (e.g. disables AVX, AVX2)" DEFAULT OFF)
 endif()
 
-optionx(ENABLE_LOGS BOOL "If debug logs should be enabled" DEFAULT ${DEBUG})
+# Disabling logs by default for tests yields faster builds
+if (DEBUG AND NOT TEST)
+  set(DEFAULT_ENABLE_LOGS ON)
+else()
+  set(DEFAULT_ENABLE_LOGS OFF)
+endif()
+
+optionx(ENABLE_LOGS BOOL "If debug logs should be enabled" DEFAULT ${DEFAULT_ENABLE_LOGS})
 optionx(ENABLE_ASSERTIONS BOOL "If debug assertions should be enabled" DEFAULT ${DEBUG})
 
 optionx(ENABLE_CANARY BOOL "If canary features should be enabled" DEFAULT ON)
@@ -86,6 +102,11 @@ optionx(ENABLE_LTO BOOL "If LTO (link-time optimization) should be used" DEFAULT
 if(LINUX)
   optionx(ENABLE_VALGRIND BOOL "If Valgrind support should be enabled" DEFAULT OFF)
 endif()
+if(DEBUG AND APPLE AND CMAKE_SYSTEM_PROCESSOR MATCHES "arm64|aarch64")
+  optionx(ENABLE_ASAN BOOL "If ASAN support should be enabled" DEFAULT ON)
+else()
+  optionx(ENABLE_ASAN BOOL "If ASAN support should be enabled" DEFAULT OFF)
+endif()
 
 optionx(ENABLE_PRETTIER BOOL "If prettier should be ran" DEFAULT OFF)
 

cmake/scripts/DownloadZig.cmake

@@ -1,16 +1,16 @@
 get_filename_component(SCRIPT_NAME ${CMAKE_CURRENT_LIST_FILE} NAME)
 message(STATUS "Running script: ${SCRIPT_NAME}")
 
-if(NOT ZIG_PATH OR NOT ZIG_COMMIT OR NOT ZIG_VERSION)
-  message(FATAL_ERROR "ZIG_PATH, ZIG_COMMIT, and ZIG_VERSION are required")
+if(NOT ZIG_PATH OR NOT ZIG_COMMIT)
+  message(FATAL_ERROR "ZIG_PATH and ZIG_COMMIT required")
 endif()
 
 if(CMAKE_HOST_APPLE)
-  set(ZIG_OS "macos")
+  set(ZIG_OS_ABI "macos-none")
 elseif(CMAKE_HOST_WIN32)
-  set(ZIG_OS "windows")
+  set(ZIG_OS_ABI "windows-gnu")
 elseif(CMAKE_HOST_UNIX)
-  set(ZIG_OS "linux")
+  set(ZIG_OS_ABI "linux-musl")
 else()
   message(FATAL_ERROR "Unsupported operating system: ${CMAKE_HOST_SYSTEM_NAME}")
 endif()
@@ -28,17 +28,19 @@ else()
   message(FATAL_ERROR "Unsupported architecture: ${CMAKE_HOST_SYSTEM_PROCESSOR}")
 endif()
 
-set(ZIG_NAME zig-${ZIG_OS}-${ZIG_ARCH}-${ZIG_VERSION})
+set(ZIG_NAME bootstrap-${ZIG_ARCH}-${ZIG_OS_ABI})
+if(ZIG_COMPILER_SAFE)
+  set(ZIG_NAME ${ZIG_NAME}-ReleaseSafe)
+endif()
+set(ZIG_FILENAME ${ZIG_NAME}.zip)
 
 if(CMAKE_HOST_WIN32)
   set(ZIG_EXE "zig.exe")
-  set(ZIG_FILENAME ${ZIG_NAME}.zip)
 else()
   set(ZIG_EXE "zig")
-  set(ZIG_FILENAME ${ZIG_NAME}.tar.xz)
 endif()
 
-set(ZIG_DOWNLOAD_URL https://ziglang.org/download/${ZIG_VERSION}/${ZIG_FILENAME})
+set(ZIG_DOWNLOAD_URL https://github.com/oven-sh/zig/releases/download/autobuild-${ZIG_COMMIT}/${ZIG_FILENAME})
 
 execute_process(
   COMMAND
@@ -62,35 +64,8 @@ if(NOT EXISTS ${ZIG_PATH}/${ZIG_EXE})
 endif()
 
 # Tools like VSCode need a stable path to the zig executable, on both Unix and Windows
-# To workaround this, we create a `bun.exe` symlink on Unix.
+# To workaround this, we create a `zig.exe` & `zls.exe` symlink on Unix.
 if(NOT WIN32)
   file(CREATE_LINK ${ZIG_PATH}/${ZIG_EXE} ${ZIG_PATH}/zig.exe SYMBOLIC)
+  file(CREATE_LINK ${ZIG_PATH}/zls ${ZIG_PATH}/zls.exe SYMBOLIC)
 endif()
-
-set(ZIG_REPOSITORY_PATH ${ZIG_PATH}/repository)
-
-execute_process(
-  COMMAND
-    ${CMAKE_COMMAND}
-      -DGIT_PATH=${ZIG_REPOSITORY_PATH}
-      -DGIT_REPOSITORY=oven-sh/zig
-      -DGIT_COMMIT=${ZIG_COMMIT}
-      -P ${CMAKE_CURRENT_LIST_DIR}/GitClone.cmake
-  ERROR_STRIP_TRAILING_WHITESPACE
-  ERROR_VARIABLE
-    ZIG_REPOSITORY_ERROR
-  RESULT_VARIABLE
-    ZIG_REPOSITORY_RESULT
-)
-
-if(NOT ZIG_REPOSITORY_RESULT EQUAL 0)
-  message(FATAL_ERROR "Download failed: ${ZIG_REPOSITORY_ERROR}")
-endif()
-
-file(REMOVE_RECURSE ${ZIG_PATH}/lib)
-
-# Use copy_directory instead of file(RENAME) because there were
-# race conditions in CI where some files were not copied.
-execute_process(COMMAND ${CMAKE_COMMAND} -E copy_directory ${ZIG_REPOSITORY_PATH}/lib ${ZIG_PATH}/lib)
-
-file(REMOVE_RECURSE ${ZIG_REPOSITORY_PATH})

cmake/targets/BuildBoringSSL.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     oven-sh/boringssl
   COMMIT
-    914b005ef3ece44159dca0ffad74eb42a9f6679f
+    7a5d984c69b0c34c4cbb56c6812eaa5b9bef485c
 )
 
 register_cmake_command(

cmake/targets/BuildBun.cmake

@@ -1,8 +1,8 @@
 if(DEBUG)
   set(bun bun-debug)
-elseif(ENABLE_SMOL)
-  set(bun bun-smol-profile)
-  set(bunStrip bun-smol)
+# elseif(ENABLE_SMOL)
+#   set(bun bun-smol-profile)
+#   set(bunStrip bun-smol)
 elseif(ENABLE_VALGRIND)
   set(bun bun-valgrind)
 elseif(ENABLE_ASSERTIONS)
@@ -12,6 +12,10 @@ else()
   set(bunStrip bun)
 endif()
 
+if(TEST)
+  set(bun ${bun}-test)
+endif()
+
 set(bunExe ${bun}${CMAKE_EXECUTABLE_SUFFIX})
 
 if(bunStrip)
@@ -179,6 +183,32 @@ register_command(
     ${BUN_NODE_FALLBACKS_OUTPUTS}
 )
 
+# An embedded copy of react-refresh is used when the user forgets to install it.
+# The library is not versioned alongside React.
+set(BUN_REACT_REFRESH_OUTPUT ${BUN_NODE_FALLBACKS_OUTPUT}/react-refresh.js)
+register_command(
+  TARGET
+    bun-node-fallbacks-react-refresh
+  COMMENT
+    "Building node-fallbacks/react-refresh.js"
+  CWD
+    ${BUN_NODE_FALLBACKS_SOURCE}
+  COMMAND
+    ${BUN_EXECUTABLE} build
+      ${BUN_NODE_FALLBACKS_SOURCE}/node_modules/react-refresh/cjs/react-refresh-runtime.development.js
+      --outfile=${BUN_REACT_REFRESH_OUTPUT}
+      --target=browser
+      --format=cjs
+      --minify
+      --define:process.env.NODE_ENV=\"'development'\"
+  SOURCES
+    ${BUN_NODE_FALLBACKS_SOURCE}/package.json
+    ${BUN_NODE_FALLBACKS_SOURCE}/bun.lock
+    ${BUN_NODE_FALLBACKS_NODE_MODULES}
+  OUTPUTS
+    ${BUN_REACT_REFRESH_OUTPUT}
+)
+
 set(BUN_ERROR_CODE_SCRIPT ${CWD}/src/codegen/generate-node-errors.ts)
 
 set(BUN_ERROR_CODE_SOURCES
@@ -404,7 +434,9 @@ set(BUN_OBJECT_LUT_SOURCES
   ${CWD}/src/bun.js/bindings/ZigGlobalObject.lut.txt
   ${CWD}/src/bun.js/bindings/JSBuffer.cpp
   ${CWD}/src/bun.js/bindings/BunProcess.cpp
+  ${CWD}/src/bun.js/bindings/ProcessBindingBuffer.cpp
   ${CWD}/src/bun.js/bindings/ProcessBindingConstants.cpp
+  ${CWD}/src/bun.js/bindings/ProcessBindingFs.cpp
   ${CWD}/src/bun.js/bindings/ProcessBindingNatives.cpp
   ${CWD}/src/bun.js/modules/NodeModuleModule.cpp
   ${CODEGEN_PATH}/ZigGeneratedClasses.lut.txt
@@ -415,7 +447,9 @@ set(BUN_OBJECT_LUT_OUTPUTS
   ${CODEGEN_PATH}/ZigGlobalObject.lut.h
   ${CODEGEN_PATH}/JSBuffer.lut.h
   ${CODEGEN_PATH}/BunProcess.lut.h
+  ${CODEGEN_PATH}/ProcessBindingBuffer.lut.h
   ${CODEGEN_PATH}/ProcessBindingConstants.lut.h
+  ${CODEGEN_PATH}/ProcessBindingFs.lut.h
   ${CODEGEN_PATH}/ProcessBindingNatives.lut.h
   ${CODEGEN_PATH}/NodeModuleModule.lut.h
   ${CODEGEN_PATH}/ZigGeneratedClasses.lut.h
@@ -498,8 +532,6 @@ file(GLOB_RECURSE BUN_ZIG_SOURCES ${CONFIGURE_DEPENDS}
 
 list(APPEND BUN_ZIG_SOURCES
   ${CWD}/build.zig
-  ${CWD}/root.zig
-  ${CWD}/root_wasm.zig
   ${BUN_BINDGEN_ZIG_OUTPUTS}
 )
 
@@ -508,6 +540,7 @@ set(BUN_ZIG_GENERATED_SOURCES
   ${BUN_FALLBACK_DECODER_OUTPUT}
   ${BUN_RUNTIME_JS_OUTPUT}
   ${BUN_NODE_FALLBACKS_OUTPUTS}
+  ${BUN_REACT_REFRESH_OUTPUT}
   ${BUN_ERROR_CODE_OUTPUTS}
   ${BUN_ZIG_GENERATED_CLASSES_OUTPUTS}
   ${BUN_JAVASCRIPT_OUTPUTS}
@@ -520,7 +553,13 @@ else()
   list(APPEND BUN_ZIG_GENERATED_SOURCES ${BUN_BAKE_RUNTIME_OUTPUTS})
 endif()
 
-set(BUN_ZIG_OUTPUT ${BUILD_PATH}/bun-zig.o)
+if (TEST)
+  set(BUN_ZIG_OUTPUT ${BUILD_PATH}/bun-test.o)
+  set(ZIG_STEPS test)
+else()
+  set(BUN_ZIG_OUTPUT ${BUILD_PATH}/bun-zig.o)
+  set(ZIG_STEPS obj)
+endif()
 
 if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|ARM|arm64|ARM64|aarch64|AARCH64")
   if(APPLE)
@@ -549,10 +588,10 @@ register_command(
   GROUP
     console
   COMMENT
-    "Building src/*.zig for ${ZIG_TARGET}"
+    "Building src/*.zig into ${BUN_ZIG_OUTPUT} for ${ZIG_TARGET}"
   COMMAND
     ${ZIG_EXECUTABLE}
-      build obj
+      build ${ZIG_STEPS}
       ${CMAKE_ZIG_FLAGS}
       --prefix ${BUILD_PATH}
       -Dobj_format=${ZIG_OBJECT_FORMAT}
@@ -566,6 +605,7 @@ register_command(
       -Dcodegen_path=${CODEGEN_PATH}
       -Dcodegen_embed=$<IF:$<BOOL:${CODEGEN_EMBED}>,true,false>
       --prominent-compile-errors
+      --summary all
       ${ZIG_FLAGS_BUN}
   ARTIFACTS
     ${BUN_ZIG_OUTPUT}
@@ -592,6 +632,7 @@ file(GLOB BUN_CXX_SOURCES ${CONFIGURE_DEPENDS}
   ${CWD}/src/bun.js/bindings/sqlite/*.cpp
   ${CWD}/src/bun.js/bindings/webcrypto/*.cpp
   ${CWD}/src/bun.js/bindings/webcrypto/*/*.cpp
+  ${CWD}/src/bun.js/bindings/node/crypto/*.cpp
   ${CWD}/src/bun.js/bindings/v8/*.cpp
   ${CWD}/src/bun.js/bindings/v8/shim/*.cpp
   ${CWD}/src/bake/*.cpp
@@ -604,6 +645,8 @@ file(GLOB BUN_C_SOURCES ${CONFIGURE_DEPENDS}
   ${BUN_USOCKETS_SOURCE}/src/eventing/*.c
   ${BUN_USOCKETS_SOURCE}/src/internal/*.c
   ${BUN_USOCKETS_SOURCE}/src/crypto/*.c
+  ${CWD}/src/bun.js/bindings/uv-posix-polyfills.c
+  ${CWD}/src/bun.js/bindings/uv-posix-stubs.c
 )
 
 if(WIN32)
@@ -707,7 +750,7 @@ endif()
 # --- C/C++ Properties ---
 
 set_target_properties(${bun} PROPERTIES
-  CXX_STANDARD 20
+  CXX_STANDARD 23
   CXX_STANDARD_REQUIRED YES
   CXX_EXTENSIONS YES
   CXX_VISIBILITY_PRESET hidden
@@ -716,6 +759,18 @@ set_target_properties(${bun} PROPERTIES
   VISIBILITY_INLINES_HIDDEN YES
 )
 
+if (NOT WIN32)
+  # Enable precompiled headers
+  # Only enable in these scenarios:
+  # 1. NOT in CI, OR
+  # 2. In CI AND BUN_CPP_ONLY is enabled
+  if(NOT CI OR (CI AND BUN_CPP_ONLY))
+    target_precompile_headers(${bun} PRIVATE
+      "$<$<COMPILE_LANGUAGE:CXX>:${CWD}/src/bun.js/bindings/root.h>"
+    )
+  endif()
+endif()
+
 # --- C/C++ Includes ---
 
 if(WIN32)
@@ -729,6 +784,7 @@ target_include_directories(${bun} PRIVATE
   ${CWD}/src/bun.js/bindings
   ${CWD}/src/bun.js/bindings/webcore
   ${CWD}/src/bun.js/bindings/webcrypto
+  ${CWD}/src/bun.js/bindings/node/crypto
   ${CWD}/src/bun.js/bindings/sqlite
   ${CWD}/src/bun.js/bindings/v8
   ${CWD}/src/bun.js/modules
@@ -741,6 +797,10 @@ target_include_directories(${bun} PRIVATE
   ${NODEJS_HEADERS_PATH}/include
 )
 
+if(NOT WIN32) 
+  target_include_directories(${bun} PRIVATE ${CWD}/src/bun.js/bindings/libuv)
+endif()
+
 if(LINUX)
   include(CheckIncludeFiles)
   check_include_files("sys/queue.h" HAVE_SYS_QUEUE_H)
@@ -827,6 +887,15 @@ if(NOT WIN32)
       )
     endif()
 
+    if (ENABLE_ASAN)
+      target_compile_options(${bun} PUBLIC
+        -fsanitize=address
+      )
+      target_link_libraries(${bun} PUBLIC
+        -fsanitize=address
+      )
+    endif()
+
     target_compile_options(${bun} PUBLIC
       -Werror=return-type
       -Werror=return-stack-address
@@ -840,6 +909,7 @@ if(NOT WIN32)
       -Werror=sometimes-uninitialized
       -Werror=unused
       -Wno-unused-function
+      -Wno-c++23-lambda-attributes
       -Wno-nullability-completeness
       -Werror
     )
@@ -856,10 +926,15 @@ if(NOT WIN32)
       -Werror=nonnull
       -Werror=move
       -Werror=sometimes-uninitialized
+      -Wno-c++23-lambda-attributes
       -Wno-nullability-completeness
       -Werror
     )
   endif()
+else()
+  target_compile_options(${bun} PUBLIC
+    -Wno-nullability-completeness
+  )
 endif()
 
 # --- Linker options ---
@@ -902,28 +977,17 @@ endif()
 
 if(LINUX)
   if(NOT ABI STREQUAL "musl")
-  # on arm64
-  if(CMAKE_SYSTEM_PROCESSOR MATCHES "arm|ARM|arm64|ARM64|aarch64|AARCH64")
-    target_link_options(${bun} PUBLIC
-      -Wl,--wrap=exp
-      -Wl,--wrap=expf
-      -Wl,--wrap=fcntl64
-      -Wl,--wrap=log
-      -Wl,--wrap=log2
-      -Wl,--wrap=log2f
-      -Wl,--wrap=logf
-      -Wl,--wrap=pow
-      -Wl,--wrap=powf
-    )
-  else()
-    target_link_options(${bun} PUBLIC
-      -Wl,--wrap=exp
-      -Wl,--wrap=expf
-      -Wl,--wrap=log2f
-      -Wl,--wrap=logf
-      -Wl,--wrap=powf
-    )
-  endif()
+  target_link_options(${bun} PUBLIC
+    -Wl,--wrap=exp
+    -Wl,--wrap=expf
+    -Wl,--wrap=fcntl64
+    -Wl,--wrap=log
+    -Wl,--wrap=log2
+    -Wl,--wrap=log2f
+    -Wl,--wrap=logf
+    -Wl,--wrap=pow
+    -Wl,--wrap=powf
+  )
   endif()
 
   if(NOT ABI STREQUAL "musl")
@@ -1052,6 +1116,7 @@ add_custom_target(dependencies DEPENDS ${BUN_TARGETS})
 
 if(APPLE)
   target_link_libraries(${bun} PRIVATE icucore resolv)
+  target_compile_definitions(${bun} PRIVATE U_DISABLE_RENAMING=1)
 endif()
 
 if(USE_STATIC_SQLITE)

cmake/targets/BuildLibDeflate.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     ebiggers/libdeflate
   COMMIT
-    733848901289eca058804ca0737f8796875204c8
+    78051988f96dc8d8916310d8b24021f01bd9e102
 )
 
 register_cmake_command(

cmake/targets/BuildLolHtml.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     cloudflare/lol-html
   COMMIT
-    4f8becea13a0021c8b71abd2dcc5899384973b66
+    67f1d4ffd6b74db7e053fb129dcce620193c180d
 )
 
 set(LOLHTML_CWD ${VENDOR_PATH}/lolhtml/c-api)

cmake/targets/BuildLshpack.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     litespeedtech/ls-hpack
   COMMIT
-    32e96f10593c7cb8553cd8c9c12721100ae9e924
+    8905c024b6d052f083a3d11d0a169b3c2735c8a1
 )
 
 if(WIN32)

cmake/targets/BuildMimalloc.cmake

@@ -4,7 +4,7 @@ register_repository(
   REPOSITORY
     oven-sh/mimalloc
   COMMIT
-    82b2c2277a4d570187c07b376557dc5bde81d848
+    1beadf9651a7bfdec6b5367c380ecc3fe1c40d1a
 )
 
 set(MIMALLOC_CMAKE_ARGS
@@ -19,6 +19,10 @@ set(MIMALLOC_CMAKE_ARGS
   -DMI_SKIP_COLLECT_ON_EXIT=ON
 )
 
+if(ENABLE_ASAN)
+  list(APPEND MIMALLOC_CMAKE_ARGS -DMI_TRACK_ASAN=ON)
+endif()
+
 if(DEBUG)
   list(APPEND MIMALLOC_CMAKE_ARGS -DMI_DEBUG_FULL=ON)
 endif()

cmake/tools/SetupBuildkite.cmake

@@ -120,6 +120,9 @@ foreach(i RANGE ${BUILDKITE_JOBS_MAX_INDEX})
     endif()
 
     if(BUILDKITE)
+      if(BUILDKITE_ARTIFACT_PATH STREQUAL "libbun-profile.a")
+        set(BUILDKITE_ARTIFACT_PATH libbun-profile.a.gz)
+      endif()
       set(BUILDKITE_DOWNLOAD_COMMAND buildkite-agent artifact download ${BUILDKITE_ARTIFACT_PATH} . --build ${BUILDKITE_BUILD_UUID} --step ${BUILDKITE_JOB_ID})
     else()
       set(BUILDKITE_DOWNLOAD_COMMAND curl -L -o ${BUILDKITE_ARTIFACT_PATH} ${BUILDKITE_ARTIFACTS_URL}/${BUILDKITE_ARTIFACT_ID})
@@ -135,6 +138,20 @@ foreach(i RANGE ${BUILDKITE_JOBS_MAX_INDEX})
       OUTPUT
         ${BUILD_PATH}/${BUILDKITE_ARTIFACT_PATH}
     )
+    if(BUILDKITE_ARTIFACT_PATH STREQUAL "libbun-profile.a.gz")
+      add_custom_command(
+        COMMENT
+          "Unpacking libbun-profile.a.gz"
+        VERBATIM COMMAND
+          gunzip libbun-profile.a.gz
+        WORKING_DIRECTORY
+          ${BUILD_PATH}
+        OUTPUT
+          ${BUILD_PATH}/libbun-profile.a
+        DEPENDS
+          ${BUILD_PATH}/libbun-profile.a.gz
+      )
+    endif()
   endforeach()
 
   list(APPEND BUILDKITE_JOBS_MATCH ${BUILDKITE_JOB_NAME})

cmake/tools/SetupBun.cmake

@@ -9,6 +9,14 @@ find_command(
     >=1.1.26
 )
 
+if (NOT CI)
+  # If node.js is not installed, it is extremely easy to make this path point to
+  # a tempdir such as /private/tmp/bun-node-ce532901c/bun, which may cause this
+  # CMake configuration break after tempdir is cleaned up (ex. after reboot).
+  get_filename_component(BUN_EXECUTABLE ${BUN_EXECUTABLE} REALPATH)
+  set(BUN_EXECUTABLE ${BUN_EXECUTABLE} CACHE FILEPATH "Bun executable" FORCE)
+endif()
+
 # If this is not set, some advanced features are not checked.
 # https://github.com/oven-sh/bun/blob/cd7f6a1589db7f1e39dc4e3f4a17234afbe7826c/src/bun.js/javascript.zig#L1069-L1072
 setenv(BUN_GARBAGE_COLLECTOR_LEVEL 1)