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clearMarks

Summary

Removes all DOMHighResTimeStamp time values for the given mark name, or removes all marks and their associated DOMHighResTimeStamp time values.

Method of apis/user_timing/Performanceapis/user_timing/Performance

Syntax

 object.clearMarks(markName);

Parameters

markName

Data-type
any

(Optional)

Name of the mark(s) to be cleared.

Return Value

No return value

Examples

// set begin mark
performance.mark("startMark");
// execute a function to be measured
someFunction();
// set end mark
performance.mark("stopMark");

// save the timing information
performance.measure("functionTime", "startMark", "stopMark");
// display the measured time
var measures = performance.getEntriesByType("measure");
alert("functionTime: " + measures[0].duration);

// clear the measure "functionTime"
performance.clearMeasures("functionTime");
// clear all marks
performance.clearMarks();

Notes

If a value for the markName parameter is specified, only marks with that name are removed. If there are no marks with the specified name, this method does nothing.

Related specifications

W3C User Timing Specification
W3C Recommendation

Attributions