Web/API/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	Status	Comment
User Timing Level 2The definition of 'clearMarks()' in that specification.	Working Draft	Clarifies clearMarks().
User TimingThe definition of 'clearMarks()' in that specification.	Recommendation	Basic definition.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
clearMarks	Chrome Full support 29 Full support 29 No support 25 — 29 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 12	Firefox Full support 41	IE Full support 10	Opera Full support 33	Safari Full support 11	WebView Android Full support ≤37 Full support ≤37 No support ≤37 — ≤37 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support 29 Full support 29 No support 25 — 29 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 42	Opera Android Full support 33	Safari iOS Full support 11	Samsung Internet Android Full support 2.0 Full support 2.0 No support 1.5 — 2.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit

Legend

Full support  

Full support

Requires a vendor prefix or different name for use.'

Requires a vendor prefix or different name for use.

performance.clearMarks() by Mozilla Contributors is licensed under CC-BY-SA 2.5.