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                [TOC] <br/><br/><br/> # <b style="color:#4F4F4F;">簡介說明</b> 原文鏈接: - [perf_hooks](http://nodejs.cn/api-v16/perf_hooks.html) ``` 版本:perf_hooks 作用:提供了W3C Web性能API的子集以及用于特定于Node.js的性能測量的其他API的實現 ``` <br/> # <b style="color:#4F4F4F;">perf_hooks.PerformanceObserver</b> <br/> # <span style="color:#619BE4">[new]-PerformanceObserver()</span> ***** 將新實例添加到性能時間線時提供通知 <br/>
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