PerformanceMeasure

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨September 2017⁩.

Note: This feature is available inWeb Workers.

PerformanceMeasure is anabstract interface forPerformanceEntry objects with anentryType of"measure". Entries of this type are created by callingperformance.measure() to add anamedDOMHighResTimeStamp (themeasure) between twomarks to the browser'sperformance timeline.

Instance properties

PerformanceMeasure.detail: Contains arbitrary metadata about the measure.

This interface extends the followingPerformanceEntry properties by qualifying/constraining the properties as follows:

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

Instance methods

This interface has no methods.

Example

See the example inUsing the User Timing API.

Chrome DevTools usesperformance.measure() and in particular a structureddetail property as part of its extensibility API that surfaces these in custom tracks in performance traces. See the example inPerformance: measure() method page and theChrome's extensibility API documentation for more information and examples.