bun.sh/test/cli/run/cjs-fixture-leak-small.js

const dest = require.resolve("./leak-fixture-small-ast.js");

let gc = globalThis.gc;
if (typeof Bun !== "undefined") {
  gc = () => Bun.gc(true);
}

if (!gc) {
  gc = () => {};
}

gc();
for (let i = 0; i < 5; i++) {
  delete require.cache[dest];
  require(dest);
}
gc();
const baseline = process.memoryUsage.rss();

for (let i = 0; i < 10000; i++) {
  delete require.cache[dest];
  require(dest);
}
gc();

setTimeout(() => {
  let diff = process.memoryUsage.rss() - baseline;
  diff = (diff / 1024 / 1024) | 0;
  console.log({ leaked: diff + " MB" });
  if (diff > 48) {
    console.log("\n--fail--\n");
    process.exit(1);
  } else {
    console.log("\n--pass--\n");
  }
}, 16);