PerformanceMark

PerformanceMark is an abstract interface for performance entries with an entry type of "mark". Entries of this type are created by calling performance.mark() to add a named DOMHighResTimeStamp (the mark) to the browser's performance timeline.

The PerformanceMark interface has no properties, no methods nor any constructors. However, it qualifies and constrains the following PerformanceEntry properties for "mark" 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 "mark".

PerformanceEntry.name

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

PerformanceEntry.startTime

Set to the DOMHighResTimeStamp when performance.mark() was called.

PerformanceEntry.duration

Set to "0" (a mark has no duration).

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