Web/API/Performance/clearResourceTimings

The clearResourceTimings() method removes all performance entries with an entryType of "resource" from the browser's performance data buffer and sets the size of the performance data buffer to zero. To set the size of the browser's performance data buffer, use the Performance.setResourceTimingBufferSize() method.

Note: This feature is available in Web Workers.

Syntax

performance.clearResourceTimings();

Arguments

void

Return value

none: This method has no return value.

Example

function load_resource() {
  var image = new Image();
  image.src = "https://developer.mozilla.org/static/img/opengraph-logo.png";
}
function clear_performance_timings() {
  if (performance === undefined) {
    log("Browser does not support Web Performance");
    return;
  }
  // Create a resource timing performance entry by loading an image
  load_resource();

  var supported = typeof performance.clearResourceTimings == "function";
  if (supported) {
    console.log("Run: performance.clearResourceTimings()");
    performance.clearResourceTimings();
  } else {
    console.log("performance.clearResourceTimings() NOT supported");
    return;
  }
  // getEntries should now return zero
  var p = performance.getEntriesByType("resource");
  if (p.length == 0) 
    console.log("... Performance data buffer cleared");
  else
    console.log("... Performance data buffer NOT cleared!");
}

Specifications

Specification	Status	Comment
Resource Timing Level 1The definition of 'clearResourceTimings()' in that specification.	Candidate Recommendation	Initial definition.

Browser compatibility

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
`clearResourceTimings`	Chrome Full support 46 Full support 46 No support 22 — 57 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera Full support Yes	Safari Full support 11	WebView Android Full support 46 Full support 46 No support ? — 57 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Chrome Android Full support 46 Full support 46 No support 25 — 57 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support 11	Samsung Internet Android Full support 5.0 Full support 5.0 No support 1.5 — 7.0 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.clearResourceTimings() by Mozilla Contributors is licensed under CC-BY-SA 2.5.