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SUZUKI Sosuke f01467d3dc perf(buffer): optimize Buffer.from(array) by using setFromArrayLike directly (#26135) 
## Summary

Optimizes `Buffer.from(array)` by bypassing `JSC::construct()` overhead
(~30ns) and leveraging JSC's internal array optimizations.

## Changes

- For JSArray inputs, directly use `setFromArrayLike()` which internally
detects array indexing types (Int32Shape/DoubleShape) and uses bulk copy
operations (`copyFromInt32ShapeArray`/`copyFromDoubleShapeArray`)
- Array-like objects and iterables continue to use the existing slow
path
- Added mitata benchmark for measuring performance

## Benchmark Results

| Test | Before | After | Improvement |
|------|--------|-------|-------------|
| Buffer.from(int32[8]) | ~85ns | ~43ns | ~50% faster |
| Buffer.from(int32[64]) | ~207ns | ~120ns | ~42% faster |
| Buffer.from(int32[1024]) | ~1.85μs | ~1.32μs | ~29% faster |
| Buffer.from(double[8]) | ~86ns | ~50ns | ~42% faster |
| Buffer.from(double[64]) | ~212ns | ~151ns | ~29% faster |

Bun is now faster than Node.js for these operations.

## Test

All 449 buffer tests pass.
2026-01-15 12:10:47 -08:00
..
allocators
perf(linux): add memfd optimizations and typed flags (#25597)
2025-12-19 23:18:21 -08:00
analytics
…
api
feat(bundler): add statically-analyzable dead-code elimination via feature flags (#25462)
2025-12-11 17:44:14 -08:00
ast
fix(parser): fix bytecode CJS pragma detection after shebang (#25868)
2026-01-08 11:32:08 -08:00
async
feat: add Bun.Terminal API for pseudo-terminal (PTY) support (#25415)
2025-12-15 12:51:13 -08:00
bake
fix: use JSPromise helper methods instead of direct internal field manipulation (#25889)
2026-01-07 23:23:27 -08:00
base64
…
bun.js
perf(buffer): optimize Buffer.from(array) by using setFromArrayLike directly (#26135)
2026-01-15 12:10:47 -08:00
bundler
fix(runtime): exclude globalThis from auto-serve detection (#26107)
2026-01-14 17:41:21 -08:00
cli
fix(compile): respect autoloadBunfig: false when execArgv is present (#26017)
2026-01-14 16:08:49 -08:00
codegen
Upgrade WebKit to d5bd162d9ab2 (#25958)
2026-01-15 10:26:43 -08:00
collections
fix(bundler): fix --compile with 8+ embedded files (#25859)
2026-01-06 23:05:01 +00:00
create
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
css
fix(css): preserve logical border-radius properties (#26006)
2026-01-14 13:34:31 -08:00
deps
feat(cli): add --grep as alias for -t/--test-name-pattern in bun test (#25788)
2026-01-02 04:52:47 -08:00
errno
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
fs
…
glob
fix(glob): fix typo that caused patterns like .*/* to escape cwd boundary (#24939)
2025-11-23 01:41:17 -08:00
http
fix(install): prevent use-after-free when retrying failed HTTP requests (#25949)
2026-01-10 18:03:24 -08:00
init
Revert "Add Tanstack Start to bun init (#24648)"
2025-12-05 18:32:51 -08:00
install
fix(install): quote workspace: versions in yarn lockfile (#26106)
2026-01-14 18:22:32 -08:00
interchange
fix(yaml): remove YAML 1.1 legacy boolean values for YAML 1.2 compliance (#25537)
2025-12-16 14:29:39 -08:00
io
fix(process): emit EPIPE error on broken pipe for process.stdout.write() (#26124)
2026-01-14 18:37:54 -08:00
js
fix(process): emit EPIPE error on broken pipe for process.stdout.write() (#26124)
2026-01-14 18:37:54 -08:00
js_lexer
…
libarchive
fix(install): prevent symlink path traversal in tarball extraction (#25584)
2026-01-09 16:56:31 -08:00
meta
Add new bindings generator; port SSLConfig (#23169)
2025-10-03 17:10:28 -07:00
napi
feat: implement V8 Value type checking APIs (#22462)
2025-12-15 19:50:11 -08:00
node-fallbacks
ENG-21534: Satisfy aikido (#24880)
2025-11-24 20:16:03 -08:00
paths
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
ptr
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
resolver
add test for dependency order when a package's name is larger than 8 characters + fix (#25697)
2025-12-25 23:49:23 -08:00
s3
fix: correct logic bugs in libarchive, s3 credentials, and postgres bindings (#25905)
2026-01-08 19:46:06 -08:00
safety
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
semver
remove jsc.createCallback (#24910)
2025-11-20 20:56:02 -08:00
shell
fix(process): emit EPIPE error on broken pipe for process.stdout.write() (#26124)
2026-01-14 18:37:54 -08:00
sourcemap
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
sql
fix(sql): prevent hang in sequential MySQL transactions with returned array queries (#26048)
2026-01-14 12:53:04 -08:00
string
Improve Bun.stringWidth accuracy and robustness (#25447)
2025-12-10 16:17:57 -08:00
sys
feat: add Bun.Archive API for creating and extracting tarballs (#25665)
2026-01-09 00:33:35 -08:00
test
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
threading
perf: shrink ConcurrentTask from 24 bytes to 16 bytes (#25636)
2025-12-22 12:07:24 -08:00
valkey
Add fake timers for bun:test (#23764)
2025-12-01 21:59:11 -08:00
vm
Upgrade WebKit Dec 24, 2025 (#25684)
2025-12-25 14:00:58 -08:00
watcher
fix(fs.watch): emit 'change' events for files in watched directories on Linux (#26009)
2026-01-14 16:46:20 -08:00
windows
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
.clang-format
…
AGENTS.md
update CLAUDE.md
2025-10-04 02:17:55 -07:00
allocators.zig
Remove MemoryReportingAllocator (#24251)
2025-10-31 19:50:55 -07:00
analytics.zig
Add analytics tracking for CPU profiling and heap snapshots (#25053)
2025-11-26 00:02:43 -08:00
asan-config.c
misc tidyings from another branch (#24406)
2025-11-05 15:28:28 -08:00
asan.zig
…
ast.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
bake.bind.ts
…
bake.zig
feat(ENG-21362): Environment Variables Store (#23930)
2025-10-23 23:08:08 -07:00
bits.zig
…
boringssl.zig
Harden TLS hostname verification (#25727)
2026-01-05 10:21:49 -08:00
brotli.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
btjs.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
bun.exe.manifest
…
bun.ico
…
bun.js.zig
fix(compile): respect autoloadBunfig: false when execArgv is present (#26017)
2026-01-14 16:08:49 -08:00
bun.zig
feat(bundler): add statically-analyzable dead-code elimination via feature flags (#25462)
2025-12-11 17:44:14 -08:00
bunfig.zig
update minimumReleaseAge (#25057)
2025-11-25 11:06:24 -08:00
c-headers-for-zig.h
…
cache.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
ci_info.zig
Update ci_info with more CI detection (#23708)
2025-11-10 19:58:02 -08:00
CLAUDE.md
Update CLAUDE.md
2026-01-07 12:33:21 -08:00
cli.zig
fix(cli): prevent --version/--help interception in standalone executables with compile-exec-argv (#26083)
2026-01-14 13:10:53 -08:00
collections.zig
Add generic-allocator ArrayList (#22917)
2025-09-26 15:19:45 -07:00
compile_target.zig
zig: switch exhaustively on os + arch more (#24796)
2025-11-18 10:49:21 -08:00
comptime_string_map.zig
feat(ENG-21324): Implement hosted_git_info.zig (#24138)
2025-10-29 19:29:04 -07:00
ConfigVersion.zig
add "configVersion" to bun.lock(b) (#24236)
2025-11-03 22:20:07 -08:00
copy_file.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
crash_handler.zig
remove jsc.createCallback (#24910)
2025-11-20 20:56:02 -08:00
csrf.zig
remove jsc.createCallback (#24910)
2025-11-20 20:56:02 -08:00
darwin.zig
…
defines-table.zig
fix(build): Promise.all() async module dependencies (#22704)
2025-09-26 22:21:00 -07:00
defines.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
deprecated.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
dir.zig
…
dns.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
env_loader.zig
fix: prevent out-of-bounds access in NO_PROXY parsing (#25617)
2025-12-19 23:17:29 -08:00
env_var.zig
Align temp directory resolution with os.tmpdir() (#25878)
2026-01-07 16:09:49 -08:00
env.zig
test(ENG-21524): Fuzzilli Stop-Gap (#24826)
2025-11-20 23:37:31 -08:00
fallback-backend.html
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
fallback.html
…
fallback.ts
…
favicon.png
…
fd.zig
zig: switch exhaustively on os + arch more (#24796)
2025-11-18 10:49:21 -08:00
feature_flags.zig
feat(ENG-21362): Environment Variables Store (#23930)
2025-10-23 23:08:08 -07:00
fixtures_example.com.html
…
fmt.bind.ts
…
fmt.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
fs.zig
Align temp directory resolution with os.tmpdir() (#25878)
2026-01-07 16:09:49 -08:00
generated_perf_trace_events.zig
Add Bun.YAML.parse and YAML imports (#22073)
2025-08-23 06:55:30 -07:00
glob.zig
fix(install): make negative workspace patterns work (#23229)
2025-10-04 00:31:47 -07:00
Global.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
handle_oom.zig
Passthrough anyerror when using handleOom (#23176)
2025-10-02 14:11:29 -07:00
heap_breakdown.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
highway.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
hmac.zig
…
HTMLScanner.zig
Refactor BabyList (#22502)
2025-09-09 20:41:10 -07:00
http.zig
feat(websocket): add HTTP/HTTPS proxy support (#25614)
2026-01-08 16:21:34 -08:00
identity_context.zig
…
import_record.zig
feat(bundler): add metafile support matching esbuild format (#25842)
2026-01-07 22:46:51 -08:00
ini.zig
fix: dupe ca string in .npmrc to prevent use-after-free (#25563)
2025-12-17 19:56:25 -08:00
interchange.zig
Add Bun.YAML.parse and YAML imports (#22073)
2025-08-23 06:55:30 -07:00
js_lexer_tables.zig
…
js_lexer.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
js_parser.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
js_printer.zig
perf: pack boolean flags and reorder fields to reduce struct padding (#25627)
2025-12-21 17:12:42 -08:00
jsc_stub.zig
…
linear_fifo.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
linker.lds
…
linker.zig
perf: pack boolean flags and reorder fields to reduce struct padding (#25627)
2025-12-21 17:12:42 -08:00
linux.zig
feat(ENG-21362): Environment Variables Store (#23930)
2025-10-23 23:08:08 -07:00
logger.zig
perf: pack boolean flags and reorder fields to reduce struct padding (#25627)
2025-12-21 17:12:42 -08:00
logo.svg
…
macho.zig
feat(build): add --compile-executable-path CLI flag (#25934)
2026-01-09 16:21:40 -08:00
main_test.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
main_wasm.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
main.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
memory.zig
Port SocketConfig to bindings generator (#23755)
2025-10-18 18:14:01 -07:00
meta.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
node_fallbacks.zig
…
open.zig
Fix Windows shell crash with && operator and external commands (#22651)
2025-09-14 04:14:48 -07:00
options.zig
feat(bundler): add metafile support matching esbuild format (#25842)
2026-01-07 22:46:51 -08:00
output.zig
fix(windows): use GetConsoleCP() instead of GetConsoleOutputCP() for input codepage (#25252)
2025-11-30 23:11:33 -08:00
OutputFile.zig
Align temp directory resolution with os.tmpdir() (#25878)
2026-01-07 16:09:49 -08:00
patch.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
paths.zig
fix(pnpm migration): correctly resolve link: dependencies on the root package (#23111)
2025-09-30 00:10:15 -07:00
pe.zig
fix(compile): use 8-byte header for embedded section to ensure bytecode alignment (#25377)
2025-12-06 16:37:09 -08:00
perf.zig
Add fake timers for bun:test (#23764)
2025-12-01 21:59:11 -08:00
pool.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
Progress.zig
Fix progress showing kb for downloading packages instead of count (#24700)
2025-11-13 19:29:16 -08:00
ptr.zig
Add ExternalShared and RawRefCount (#23013)
2025-09-26 15:15:58 -07:00
renamer.zig
fix(bundler): rename named function expressions when shadowing outer symbol (#26027)
2026-01-14 12:52:41 -08:00
result.zig
…
router.zig
zig: fix missing uses of bun.callmod_inline (#24738)
2025-11-15 16:36:15 -08:00
runtime.bun.js
…
runtime.js
fix(build): Promise.all() async module dependencies (#22704)
2025-09-26 22:21:00 -07:00
runtime.zig
feat(bundler): add statically-analyzable dead-code elimination via feature flags (#25462)
2025-12-11 17:44:14 -08:00
safety.zig
Static allocator polymorphism (#22227)
2025-09-03 15:40:44 -07:00
semver.zig
fix(install): change semver core numbers to u64 (#22889)
2025-09-22 19:28:26 -07:00
sha.zig
…
SignalCode.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
StandaloneModuleGraph.zig
fix(compile): respect autoloadBunfig: false when execArgv is present (#26017)
2026-01-14 16:08:49 -08:00
StaticHashMap.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
string.zig
fix(buffer): handle string allocation failures in encoding operations (#25214)
2025-11-28 22:56:28 -08:00
symbols.def
…
symbols.dyn
feat: implement V8 Value type checking APIs (#22462)
2025-12-15 19:50:11 -08:00
symbols.txt
feat: implement V8 Value type checking APIs (#22462)
2025-12-15 19:50:11 -08:00
sys_uv.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
sys.zig
fix(shell): implement long listing format for ls -l builtin (#25991)
2026-01-14 13:31:06 -08:00
system_timer.zig
…
threading.zig
Static allocator polymorphism (#22227)
2025-09-03 15:40:44 -07:00
tmp.zig
…
tracy.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
trait.zig
…
transpiler.zig
perf: pack boolean flags and reorder fields to reduce struct padding (#25627)
2025-12-21 17:12:42 -08:00
tsconfig.json
Add new bindings generator; port SSLConfig (#23169)
2025-10-03 17:10:28 -07:00
unit_test.zig
…
url.zig
fix(http): support proxy passwords longer than 4096 characters (#25530)
2025-12-15 13:21:41 -08:00
util.zig
…
walker_skippable.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
Watcher.zig
fix(fs.watch): emit 'change' events for files in watched directories on Linux (#26009)
2026-01-14 16:46:20 -08:00
which_npm_client.zig
…
which.zig
…
windows-app-info.rc
…
windows.zig
fix(windows): use GetConsoleCP() instead of GetConsoleOutputCP() for input codepage (#25252)
2025-11-30 23:11:33 -08:00
work_pool.zig
…
workaround_missing_symbols.zig
Update to zig 0.15.2 (#24204)
2025-11-10 14:38:26 -08:00
wyhash.zig
…
zlib.test.gz
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zlib.test.txt
…
zlib.zig
fix: memory leaks in error-handling code for Brotli, Zstd, and Zlib compression state machines (#25592)
2025-12-18 21:42:14 -08:00