From cde3928a10627510ae0aee7728e5498a95235482 Mon Sep 17 00:00:00 2001
From: Anatoli Papirovski <anatoli.papirovski@postmates.com>
Date: Thu, 6 Jun 2019 09:18:41 +0200
Subject: process: improve queueMicrotask performance

Optimize the hot code paths of queueMicrotask by
not creating unnecessary objects, not looking up
properties on frozen primordials, etc.

PR-URL: https://github.com/nodejs/node/pull/28093
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
---
 lib/internal/process/task_queues.js | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

(limited to 'lib/internal/process')

diff --git a/lib/internal/process/task_queues.js b/lib/internal/process/task_queues.js
index 1f203c86ed..34e925aaf5 100644
--- a/lib/internal/process/task_queues.js
+++ b/lib/internal/process/task_queues.js
@@ -128,15 +128,13 @@ function nextTick(callback) {
 }
 
 let AsyncResource;
+const defaultMicrotaskResourceOpts = { requireManualDestroy: true };
 function createMicrotaskResource() {
   // Lazy load the async_hooks module
-  if (!AsyncResource) {
+  if (AsyncResource === undefined) {
     AsyncResource = require('async_hooks').AsyncResource;
   }
-  return new AsyncResource('Microtask', {
-    triggerAsyncId: getDefaultTriggerAsyncId(),
-    requireManualDestroy: true,
-  });
+  return new AsyncResource('Microtask', defaultMicrotaskResourceOpts);
 }
 
 function runMicrotask() {
-- 
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