Web/API/Performance/memory

Syntax

timingInfo = performance.memory

Attributes

jsHeapSizeLimit

The maximum size of the heap, in bytes, that is available to the context.

totalJSHeapSize

 The total allocated heap size, in bytes.

usedJSHeapSize

The currently active segment of JS heap, in bytes.

Specifications

None.

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
memory Non-standard'	Chrome Full support 7	Edge Full support ≤79	Firefox No support No	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support 18	Firefox Android No support No	Opera Android Full support Yes	Safari iOS No support No	Samsung Internet Android Full support 1.0

Legend

Full support  

Full support

No support  

No support

Non-standard. Expect poor cross-browser support.'

Non-standard. Expect poor cross-browser support.

See also

• The Performance interface it belongs to.

Performance.memory by Mozilla Contributors is licensed under CC-BY-SA 2.5.