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

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes ?60 No Yes No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No Yes ?60 Yes No ?

Document Tags and Contributors

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