Tag: 后台任务

Javascript背景循环

假设我们有一个loop.js文件： longLoop().then(res => console.log('loop result processing started')) console.log('read file started') require('fs').readFile(__filename, () => console.log('file processing started')) setTimeout(() => console.log('timer fires'), 500) async function longLoop () { console.log('loop started') let res = 0 for (let i = 0; i < 1e7; i++) { res += Math.sin(i) // arbitrary computation heavy operation if (i % 1e5 === […]