coderef

Memory measurementLimited availability

The measureUserAgentSpecificMemory() method estimates the memory usage of a web application including all its iframes and workers.

Not yet supported in all major browsers — check the table and provide a fallback.

How to use ↓Compare browsers

Browser support

DesktopChrome
1–88Not supported
89+Supportedsince Mar 2, 2021
Current: 155
Edge
12–88Not supported
89+Supportedsince Mar 4, 2021
Current: 154
Firefox
✕Not supportedup to 157
Current: 157
Safari
✕Not supportedup to 27
Current: 27
MobileChrome Android
18–88Not supported
89+Supportedsince Mar 2, 2021
Current: 155
Firefox Android
✕Not supportedup to 157
Current: 157
Safari iOS
✕Not supportedup to 27
Current: 27

How to use

Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.

Example

Full syntax and examples are on MDN: measureUserAgentSpecificMemory.

Feature detection

JS · check before using
if ("Performance" in globalThis && "measureUserAgentSpecificMemory" in Performance.prototype) {
  // Performance.measureUserAgentSpecificMemory is available
}

Documentation (MDN)

Specification