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Performance: clearMarks() method

The clearMarks() method removes all or specific PerformanceMark objects from the browser's performance timeline.

Syntax

js

clearMarks()
clearMarks(name)

Parameters

name Optional

A string representing the name of the PerformanceMark object. If this argument is omitted, all entries with an entryType of "mark" will be removed.

Return value

None (undefined).

Examples

Removing markers

To clean up all performance marks, or just specific entries, use the clearMarks() method like this:

js

// Create a bunch of marks
performance.mark("login-started");
performance.mark("login-started");
performance.mark("login-finished");
performance.mark("form-sent");
performance.mark("video-loaded");
performance.mark("video-loaded");

performance.getEntriesByType("mark").length; // 6

// Delete just the "login-started" mark entries
performance.clearMarks("login-started");
performance.getEntriesByType("mark").length; // 4

// Delete all of the mark entries
performance.clearMarks();
performance.getEntriesByType("mark").length; // 0

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
clearMarks 2925–29 12 38 10 33 11 4.4 2925–29 42 33 11 2.01.5–2.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Performance/clearMarks