The setResourceTimingBufferSize() method sets the browser's resource timing buffer size to the specified number of "resource" performance entry type objects.

A browser's recommended resource timing buffer size is at least 150 performance entry objects.

Note: This feature is available in Web Workers.




A number representing the maximum number of performance entry objects the browser should hold in its performance entry buffer.

Return value

This method has no return value.


function set_resource_timing_buffer_size(maxSize) {
  if (performance === undefined) {
    log("Browser does not support Web Performance");
  var supported = typeof performance.setResourceTimingBufferSize == "function";
  if (supported) {
    log("... Performance.setResourceTimingBufferSize() = Yes");
  } else {
    log("... Performance.setResourceTimingBufferSize() = NOT supported");


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

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support. (Yes)

46 (unprefixed)
57 (prefixed version removed)

(Yes) (Yes) (Yes) (Yes) No support
Feature Android Webview Chrome for Android Edge Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support (Yes)

46 (unprefixed)
57 (prefixed version removed)


46 (unprefixed)
57 (prefixed version removed)

(Yes) (Yes) (Yes) (Yes) (Yes) No support

Document Tags and Contributors

Contributors to this page: chrisdavidmills, jpmedley, abbycar, rolfedh, AFBarstow
Last updated by: chrisdavidmills,