Web/API/Performance/getEntries

The getEntries() method returns a list of all PerformanceEntry objects for the page. The list's members (entries) can be created by making performance marks or measures (for example by calling the mark() method) at explicit points in time. If you are only interested in performance entries of certain types or that have certain names, see getEntriesByType() and getEntriesByName().

Note: This feature is available in Web Workers.

Syntax

General syntax:

entries = window.performance.getEntries();

Return value

entries: An array of PerformanceEntry objects. The items will be in chronological order based on the entries' startTime.

Example

function use_PerformanceEntry_methods() {
  console.log("PerformanceEntry tests ...");

  if (performance.mark === undefined) {
    console.log("... performance.mark Not supported");
    return;
  }

  // Create some performance entries via the mark() method
  performance.mark("Begin");
  do_work(50000);
  performance.mark("End");
  performance.mark("Begin");
  do_work(100000);
  performance.mark("End");
  do_work(200000);
  performance.mark("End");

  // Use getEntries() to iterate through the each entry
  let p = performance.getEntries();
  for (var i=0; i < p.length; i++) {
    console.log("Entry[" + i + "]");
    check_PerformanceEntry(p[i]);
  }

  // Use getEntriesByType() to get all "mark" entries
  p = performance.getEntriesByType("mark");
  for (let i=0; i < p.length; i++) {
    console.log ("Mark only entry[" + i + "]: name = " + p[i].name + 
         "; startTime = " + p[i].startTime + 
         "; duration  = " + p[i].duration);
  }

  // Use getEntriesByName() to get all "mark" entries named "Begin"
  p = performance.getEntriesByName("Begin", "mark");
  for (let i=0; i < p.length; i++) {
    console.log ("Mark and Begin entry[" + i + "]: name = " + p[i].name + 
         "; startTime = " + p[i].startTime + 
         "; duration  = " + p[i].duration);
  }
}

Specifications

Specification	Status	Comment
Performance Timeline Level 2The definition of 'getEntries()' in that specification.	Candidate Recommendation
Performance TimelineThe definition of 'getEntries()' in that specification.	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
`getEntries`	Chrome Full support 28 Full support 28 No support 25 — 36 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Edge Full support 12	Firefox Full support Yes	IE Full support Yes	Opera No support No	Safari Full support 11	WebView Android Full support Yes	Chrome Android Full support 28 Full support 28 No support 25 — 36 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Firefox Android Full support 25	Opera Android No support No	Safari iOS Full support 11	Samsung Internet Android Full support 1.5 Full support 1.5 No support 1.5 — 3.0 Prefixed' Prefixed' Implemented with the vendor prefix: webkit

Legend

Full support: Full support
No support: No support
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.

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