1 files changed, 30 insertions, 0 deletions
diff --git a/bench/async/AsyncLocalStorage.mjs b/bench/async/AsyncLocalStorage.mjs
new file mode 100644
index 000000000..9b21ca350
--- /dev/null
+++ b/bench/async/AsyncLocalStorage.mjs
@@ -0,0 +1,30 @@
+// https://github.com/nodejs/node/issues/34493
+import { AsyncLocalStorage } from "async_hooks";
+const asyncLocalStorage = new AsyncLocalStorage();
+
+// let fn = () => Promise.resolve(2).then(() => new Promise(resolve => queueMicrotask(resolve)));
+let fn = () => /test/.test("test");
+
+let runWithExpiry = async (expiry, fn) => {
+  let iterations = 0;
+  while (Date.now() < expiry) {
+    await fn();
+    iterations++;
+  }
+  return iterations;
+};
+
+console.log(`Performed ${await runWithExpiry(Date.now() + 1000, fn)} iterations to warmup`);
+
+let withAls;
+await asyncLocalStorage.run(123, async () => {
+  withAls = await runWithExpiry(Date.now() + 45000, fn);
+  console.log(`Performed ${withAls} iterations (with ALS enabled)`);
+});
+
+asyncLocalStorage.disable();
+
+let withoutAls = await runWithExpiry(Date.now() + 45000, fn);
+console.log(`Performed ${withoutAls} iterations (with ALS disabled)`);
+
+console.log("ALS penalty: " + Math.round((1 - withAls / withoutAls) * 10000) / 100 + "%");