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longtask-observer

v0.0.2

Published

[以用户为中心的性能指标](https://web.dev/user-centric-performance-metrics/) 中提出,与用户感知的指标包含:

Downloads

6

Readme

introduction

以用户为中心的性能指标 中提出,与用户感知的指标包含:

  • 加载速度
  • 视觉稳定度
  • 平滑度
  • 👉 运行时响应速度

我们提供了 运行时响应速度 的解决方案,可以方便的监测你的某个任务阻塞了多长时间,便于性能统计与优化

usage

import longtaskObserver from "longtask-observer";

// 在点击时,进行打点
window.addEventListener("click", () => {
  longtaskObserver.tag("页面的点击");
});

// 绑定长时任务的回调
const handler = (longtaskInfo) => {
  console.log(longtaskInfo.name, longtaskInfo.duration);
  // 页面的点击  350
};

longtaskObserver.on(handler);

Q&A

Q:任务执行和 tag 的顺序是否要严格保障

A:无需特别留意,会进行智能匹配,例如下面两种写法,都是可以的:

写法 1

longtaskObserver.tag("user click");
doSomeLongTask();

写法 2

doSomeLongTask();
longtaskObserver.tag("user click");

这两中写法,都会统计到 user click 行为所耗费的时长,并且结果一致