PerformanceBaseline · Widely available

The performance global object and the PerformanceObserver API provide access to performance-related information for the current execution context.

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Sep 16, 2015. Widely available since Mar 16, 2018.

How to use ↓Compare browsers

Browser support

DesktopChrome

1–5Not supported

6+Supportedsince Sep 2, 2010

Current: 155

Edge

12+Supportedsince Jul 29, 2015

Current: 154

Firefox

1–6Not supported

7+Supportedsince Sep 27, 2011

Current: 157

Safari

1–7Not supported

8+Supportedsince Oct 16, 2014

Current: 27

MobileChrome Android

18+Supportedsince Jun 27, 2012

Current: 155

Firefox Android

4–6Not supported

7+Supportedsince Sep 27, 2011

Current: 157

Safari iOS

1–8Not supported

9+Supportedsince Sep 16, 2015

Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

Full syntax and examples are on MDN: Performance.

Feature detection

JS · check before using

if ("Performance" in globalThis) {
  // Performance is available
} else {
  // load a polyfill or use a fallback
}

Documentation (MDN)

Specification

Usage share

Sub-features

Support for each part of the feature (42). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
Performance	6	12	7	8	18	7	9
Performance.clearMarks	29	12	38	11	29	42	11
Performance.clearMeasures	29	12	38	11	29	42	11
Performance.getEntries	28	12	35	11	28	35	11
Performance.getEntriesByName	28	12	35	11	28	35	11
Performance.getEntriesByType	28	12	35	11	28	35	11
Performance.mark	28	12	38	11	28	42	11
Performance.mark.markOptions_parameter	78	79	101	14.1	78	101	14.5
Performance.mark.returns_performancemark	78	79	101	14.1	78	101	14.5
Performance.measure	28	12	38	11	28	42	11
Performance.measure.measureOptions_parameter	77	79	103	14.1	77	103	14.5
Performance.measure.returns_performancemeasure	78	79	103	14.1	78	103	14.5
Performance.now	24	12	15	8	25	15	9
Performance.timeOrigin	62	16	53	15	62	53	15
Performance.toJSON	56	12	25	14.1	56	25	14.5
PerformanceEntry	46	12	35	11	46	35	11
PerformanceEntry.duration	46	12	35	11	46	35	11
PerformanceEntry.entryType	46	12	35	11	46	35	11
PerformanceEntry.name	46	12	35	11	46	35	11
PerformanceEntry.startTime	46	12	35	11	46	35	11

Show 22 more

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
PerformanceEntry.toJSON	46	16	35	11	46	35	11
PerformanceEntry.worker_support	62	15	60	11	62	60	11
PerformanceMark	28	12	38	11	28	38	11
PerformanceMark.PerformanceMark	76	79	101	14.1	76	101	14.5
PerformanceMark.detail	78	79	101	14.1	78	101	14.5
PerformanceMeasure	25	12	38	11	25	38	11
PerformanceMeasure.detail	78	79	103	14.1	78	103	14.5
PerformanceObserver	52	79	57	11	52	57	11
PerformanceObserver.PerformanceObserver	52	79	57	11	52	57	11
PerformanceObserver.PerformanceObserver.droppedEntriesCount	95	95	✕	✕	95	✕	✕
PerformanceObserver.disconnect	52	79	57	11	52	57	11
PerformanceObserver.observe	52	79	57	11	52	57	11
PerformanceObserver.supportedEntryTypes_static	73	79	68	13	73	68	13
PerformanceObserver.takeRecords	65	79	60	15	65	60	15
PerformanceObserver.worker_support	62	79	57	11	62	57	11
PerformanceObserverEntryList	52	79	57	11	52	57	11
PerformanceObserverEntryList.getEntries	52	79	57	11	52	57	11
PerformanceObserverEntryList.getEntriesByName	52	79	57	11	52	57	11
PerformanceObserverEntryList.getEntriesByType	52	79	57	11	52	57	11
performance	6	12	7	8	18	7	9
performance.worker_support	30	14	34	11	30	34	11
http.headers.Timing-Allow-Origin	54	79	45	11	54	45	11