PerformanceMeasure

PerformanceMeasure is an abstract interface for performance entries with an entry type 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.

The PerformanceMeasure interface has no properties, no methods nor any constructors. However, it qualifies and constrains the following PerformanceEntry properties for "measure" type performance entries: name, entryType, startTime and duration.

Properties

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

PerformanceEntry.entryType

Set to "measure".

PerformanceEntry.name

Set to the name given to the measure when it was created via a call to performance.measure().

PerformanceEntry.startTime

Set to the timestamp when performance.measure() was called.

PerformanceEntry.duration

Set to 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

See also

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