PerformanceObserver.takeRecords()

The takeRecords() method of the PerformanceObserver interface returns the current list of performance entries stored in the performance observer, emptying it out.

Syntax

observer.takeRecords();

Parameters

None.

Return value

A list of PerformanceEntry objects.

Example

var observer = new PerformanceObserver(function(list, obj) {
  var entries = list.getEntries();
  for (var i=0; i < entries.length; i++) {
    // Process "mark" and "frame" events
  }
});
observer.observe({entryTypes: ["mark", "frame"]});
var records = observer.takeRecords();
console.log(records[0].name);
console.log(records[0].startTime);
console.log(records[0].duration);

Specifications

Specification Status Comment
Performance Timeline Level 2
The definition of 'takeRecords()' in that specification.
Candidate Recommendation Initial definition of takeRecords() method.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
Experimental
Chrome Full support YesEdge ? Firefox Full support 60IE No support NoOpera Full support YesSafari No support NoWebView Android No support NoChrome Android Full support YesEdge Mobile ? Firefox Android Full support 60Opera Android Full support YesSafari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

Document Tags and Contributors

Contributors to this page: fscholz, Claas, jamietre, chrisdavidmills
Last updated by: fscholz,