process: preserve AsyncLocalStorage in queueMicrotask only when needed

Author: gurgunday

lib/internal/process/task_queues.js

@@ -25,6 +25,7 @@ const {
 
 const {
   getDefaultTriggerAsyncId,
+  getHookArrays,
   newAsyncId,
   initHooksExist,
   emitInit,
@@ -158,13 +159,19 @@ const defaultMicrotaskResourceOpts = { requireManualDestroy: true };
 function queueMicrotask(callback) {
   validateFunction(callback, 'callback');
 
-  const asyncResource = new AsyncResource(
-    'Microtask',
-    defaultMicrotaskResourceOpts,
-  );
-  asyncResource.callback = callback;
-
-  enqueueMicrotask(FunctionPrototypeBind(runMicrotask, asyncResource));
+  const contextFrame = AsyncContextFrame.current();
+  if (contextFrame || getHookArrays()[0].length > 0) {
+    // Slow path: need async hooks or context frame propagation
+    const asyncResource = new AsyncResource(
+      'Microtask',
+      defaultMicrotaskResourceOpts,
+    );
+    asyncResource.callback = callback;
+    enqueueMicrotask(FunctionPrototypeBind(runMicrotask, asyncResource));
+  } else {
+    // Fast path: no hooks, no context frames - just enqueue directly
+    enqueueMicrotask(callback);
+  }
 }
 
 module.exports = {

test/fixtures/errors/async_error_nexttick_main.snapshot

@@ -1,7 +1,7 @@
 Error: test
     at one (*fixtures*async-error.js:4:9)
     at two (*fixtures*async-error.js:17:9)
-    at process.processTicksAndRejections (node:internal*process*task_queues:103:5)
+    at process.processTicksAndRejections (node:internal*process*task_queues:104:5)
     at async three (*fixtures*async-error.js:20:3)
     at async four (*fixtures*async-error.js:24:3)
     at async main (*async_error_nexttick_main.js:7:5)