Web/API/Window/performance

The Window interface's performance property returns a Performance object, which can be used to gather performance information about the current document. It serves as the point of exposure for the Performance Timeline API, the High Resolution Time API, the Navigation Timing API, the User Timing API, and the Resource Timing API.

Syntax

performanceData = window.performance;

Value

A Performance object offering access to the performance and timing-related information offered by the APIs it exposes.

Specifications

Specification	Status	Comment
High Resolution TimeThe definition of 'window.performance' in that specification.	Recommendation	Defines now() method.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

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
performance	Chrome Full support 6	Edge Full support 12	Firefox Full support 7	IE Full support 9	Opera Full support 15	Safari Full support 8	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 7	Opera Android Full support 14	Safari iOS Full support 9	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

Window.performance by Mozilla Contributors is licensed under CC-BY-SA 2.5.