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この記事はまだボランティアによって 日本語 に翻訳されていません。ぜひ MDN に参加して翻訳を手伝ってください！
The Web Performance API allows web pages access to certain functions for measuring the performance of web pages and web applications, including the Navigation Timing API and high-resolution time data.
Methods
performance.mark()- Maps a
DOMHighResTimeStampto a specified name representing the amount of milliseconds elapsed since a reference instant.
performance.now()- Returns a
DOMHighResTimeStamprepresenting the amount of milliseconds elapsed since a reference instant.
Properties
performance.timing- Is a
PerformanceTimingobject containing latency-related performance information. performance.navigation- Is a
PerformanceNavigationobject representing the type of navigation that occurs in the given browsing context, like the amount of redirections needed to fetch the resource. - performance.memory
- A non-standard extension added in Chrome.
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