PerformanceMeasure - Web APIs 编辑

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.

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Note:

Properties

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

Returns a timestamp given to the measure when performance.measure() was called.

PerformanceEntry.duration

Returns a DOMHighResTimeStamp that is the duration of the measure (typically, the measure's end mark timestamp minus its start mark timestamp).

Methods

This interface has no methods.

Example

See the example in Using the User Timing API.

Specifications

Browser compatibility

BCD tables only load in the browser

See also

• User Timing (Overview)
• Using the User Timing API