stdio 的同步阻塞

\Synchronous blocking of stdio

Worker 利用通过 <MessagePort> 传递的消息来实现与 stdio 的交互。这意味着来自 Worker 的 stdio 输出可能会被接收端的同步代码阻塞,这会阻塞 Node.js 事件循环。

\Workers utilize message passing via <MessagePort> to implement interactions with stdio. This means that stdio output originating from a Worker can get blocked by synchronous code on the receiving end that is blocking the Node.js event loop.

import {
 Worker,
 isMainThread,
} from 'node:worker_threads';
if (isMainThread) {
 new Worker(new URL(import.meta.url));
 for (let n = 0; n < 1e10; n++) {
 // Looping to simulate work.
 }
} else {
 // This output will be blocked by the for loop in the main thread.
 console.log('foo');
}'use strict';
const {
 Worker,
 isMainThread,
} = require('node:worker_threads');
if (isMainThread) {
 new Worker(__filename);
 for (let n = 0; n < 1e10; n++) {
 // Looping to simulate work.
 }
} else {
 // This output will be blocked by the for loop in the main thread.
 console.log('foo');
}拷贝