Performance: clearMeasures() method
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 in Web Workers.
The clearMeasures() method removes all or specific PerformanceMeasure objects from the browser's performance timeline.
Syntax
js
clearMeasures()
clearMeasures(name)
Parameters
nameOptional-
A string representing the
nameof thePerformanceMeasureobject. If this argument is omitted, all entries with anentryTypeof"measure"will be removed.
Return value
None (undefined).
Examples
Removing measures
To clean up all performance measure, or just specific entries, use the clearMeasures() method like this:
js
// Create a bunch of measures
performance.measure("from navigation");
performance.mark("a");
performance.measure("from mark a", "a");
performance.measure("from navigation");
performance.measure("from mark a", "a");
performance.mark("b");
performance.measure("between a and b", "a", "b");
performance.getEntriesByType("measure").length; // 5
// Delete just the "from navigation" measure entries
performance.clearMeasures("from navigation");
performance.getEntriesByType("measure").length; // 3
// Delete all of the measure entries
performance.clearMeasures();
performance.getEntriesByType("measure").length; // 0
Specifications
| Specification |
|---|
| User Timing # dom-performance-clearmeasures |
Browser compatibility
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