Resource timing performance entriesBaseline · Widely available
A resource performance entry records when a network event happens while loading a resource, such as when a connection starts and ends. You can use this information to measure loading times.
Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Sep 19, 2017. Widely available since Mar 19, 2020.
Browser support
DesktopChrome
1–28Not supported
29+Supportedsince Aug 20, 2013
Current: 155Edge
12+Supportedsince Jul 29, 2015
Current: 154Firefox
1–34Not supported
35+Supportedsince Jan 13, 2015
Current: 157Safari
1–10.1Not supported
11+Supportedsince Sep 19, 2017
Current: 27MobileChrome Android
18–28Not supported
29+Supportedsince Aug 21, 2013
Current: 155Firefox Android
4–34Not supported
35+Supportedsince Jan 13, 2015
Current: 157Safari iOS
1–10.3Not supported
11+Supportedsince Sep 19, 2017
Current: 27How to use
This feature is Baseline widely available — use it freely, no fallback needed.
Example
Full syntax and examples are on MDN: clearResourceTimings.
Feature detection
JS · check before using
if ("PerformanceResourceTiming" in globalThis) {
// PerformanceResourceTiming is available
} else {
// load a polyfill or use a fallback
}Sub-features
Support for each part of the feature (25). The overall table above shows when the whole feature works.
Show 5 more
| Sub-feature | Chrome | Edge | Firefox | Safari | Chrome Android | Firefox Android | Safari iOS |
|---|---|---|---|---|---|---|---|
| PerformanceResourceTiming.responseStatus | 109 | 109 | 129 | ✕ | 109 | 129 | ✕ |
| PerformanceResourceTiming.secureConnectionStart | 43 | 18 | 35 | 11 | 43 | 35 | 11 |
| PerformanceResourceTiming.toJSON | 45 | 16 | 35 | 11 | 45 | 35 | 11 |
| PerformanceResourceTiming.workerStart | 46 | 16 | 58 | 11 | 46 | 58 | 11 |
| PerformanceResourceTiming.worker_support | 43 | 15 | 60 | 12 | 43 | 60 | ✕ |