bun.sh/test/js/web/fetch/fetch-leak-test-fixture-2.js

import { heapStats } from "bun:jsc";

const { SERVER } = process.env;

if (typeof SERVER === "undefined" || !SERVER?.length) {
  throw new Error("SERVER environment variable is not set");
}

const COUNT = parseInt(process.env.COUNT || "50", 10);
var oks = 0;
var textLength = 0;
Bun.gc(true);
async function getBaseline() {
  async function iterate() {
    const tls =
      process.env.NAME === "tls-with-client"
        ? {
            cert: "-----BEGIN CERTIFICATE-----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\nOA==\n-----END CERTIFICATE-----",
          }
        : null;
    const resp = await fetch(SERVER, { tls });
    textLength = Number(resp.headers.get("Content-Length"));
    if (!textLength) {
      throw new Error("Content-Length header is not set");
    }
    (await resp.arrayBuffer()).byteLength;
  }

  for (let i = 0; i < Math.max(Math.ceil(COUNT / 10), 1); i++) {
    await iterate();
  }

  Bun.gc(true);

  return process.memoryUsage.rss();
}

const baseline = await getBaseline();

for (let j = 0; j < COUNT; j++) {
  await (async function runAll() {
    const tls =
      process.env.NAME === "tls-with-client"
        ? {
            cert: "-----BEGIN CERTIFICATE-----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\nOA==\n-----END CERTIFICATE-----",
          }
        : null;
    oks += !!(
      await fetch(SERVER, { tls }).then(r => {
        r.body;
        return r.arrayBuffer();
      })
    )?.byteLength;
  })();
}

if (oks !== COUNT) {
  throw new Error("Not all requests succeeded");
}

await Bun.sleep(10);
Bun.gc(true);
const delta = process.memoryUsage.rss() - baseline;
if ((heapStats().objectTypeCounts.Response ?? 0) > 5) {
  throw new Error("Too many Response objects: " + heapStats().objectTypeCounts.Response);
}

const bodiesLeakedPerRequest = delta / textLength;

const threshold = textLength > 1024 * 1024 * 2 ? 20 : 1000;

console.log({ delta, count: COUNT, bodySize: textLength, bodiesLeakedPerRequest, threshold });

if (bodiesLeakedPerRequest > threshold) {
  console.log("\n--fail--\n");
  process.exit(1);
} else {
  console.log("\n--pass--\n");
}