performance.clearMarks()

The clearMarks() method removes the named mark from the browser's performance entry buffer. If the method is called with no arguments, all performance entries with an entry type of "mark" will be removed from the performance entry buffer.

Note: This feature is available in Web Workers

Syntax

performance.clearMarks();
performance.clearMarks(name);

Arguments

name Optional

A DOMString representing the name of the timestamp. If this argument is omitted, all performance entries with an entry type of "mark" will be removed.

Return value

  • void
    • :

Example

The following example shows both uses of the clearMarks() method.

// Create a small helper to show how many PerformanceMark entries there are.
function logMarkCount() {
  console.log(
    "Found this many entries: " + performance.getEntriesByType("mark").length
  );
}

// Create a bunch of marks.
performance.mark("squirrel");
performance.mark("squirrel");
performance.mark("monkey");
performance.mark("monkey");
performance.mark("dog");
performance.mark("dog");

logMarkCount() // "Found this many entries: 6"

// Delete just the "squirrel" PerformanceMark entries.
performance.clearMarks('squirrel');
logMarkCount() // "Found this many entries: 4"

// Delete all of the PerformanceMark entries.
performance.clearMarks();
logMarkCount() // "Found this many entries: 0"

Specifications

Specification
User Timing Level 2 (User Timing 2)
# dom-performance-clearmarks

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
29
25-29
12
41
10
33
11
≤37
29
25-29
42
33
11
2.0
1.5-2.0

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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