Performance

Performance 接口可以获取到当前页面中与性能相关的信息。

它是 High Resolution Time API 的一部分，同时也融合了 - High Resolution Time Level 3, Defines timeOrigin property. - High Resolution Time Level 2, Defines toJson() method. - High Resolution Time, Defines now() method.

• Performance Timeline API
• Navigation Timing API
• User Timing API
  • User Timing Performance extensions, Defines mark(), clearMark(), measure() and clearMeasure() methods.
• Resource Timing API

参考

• https://developer.mozilla.org/zh-CN/docs/Web/API/Performance

• https://developer.mozilla.org/zh-CN/docs/Web/API/PerformanceEntry

• https://developer.mozilla.org/zh-CN/docs/Web/API/PerformanceEntry/entryType

• https://developer.mozilla.org/zh-CN/docs/Web/API/DOMHighResTimeStamp

• https://developer.mozilla.org/zh-CN/docs/Web/API/Performance/navigation

• https://www.w3.org/TR/navigation-timing/#sec-navigation-info-interface

• https://juejin.im/entry/58ba9cb5128fe100643da2cc