PerformanceMeasure

PerformanceMeasure is an abstract interface for PerformanceEntry objects with an entryType of " measure ". Entries of this type are created by calling performance.measure() to add a named DOMHighResTimeStamp (the measure ) between two marks to the browser's performance timeline .

特性

This interface has no properties but it extends the following PerformanceEntry properties by qualifying/constrainting the properties as follows:

PerformanceEntry.entryType
Returns " measure ".
PerformanceEntry.name
Returns the name given to the measure when it was created via a call to performance.measure() .
PerformanceEntry.startTime
返回 timestamp given to the measure when performance.measure() was called.
PerformanceEntry.duration
返回 DOMHighResTimeStamp that is the duration of the measure (typically, the measure's end mark timestamp minus its start mark timestamp).

方法

This interface has no methods.

范例

See the example in Using the User Timing API .

规范

规范 状态 Comment
User Timing Level 2
The definition of 'PerformanceMeasure' in that specification.
工作草案
User Timing
The definition of 'PerformanceMeasure' in that specification.
Recommendation Basic definition.

浏览器兼容性

更新 GitHub 上的兼容性数据
Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
PerformanceMeasure Chrome 25 Edge 12 Firefox 41 IE 10 Opera 33 Safari 11 WebView Android Yes Chrome Android 25 Firefox Android 42 Opera Android 33 Safari iOS 11 Samsung Internet Android 1.5

图例

完整支持
完整支持

另请参阅