WorkerGlobalScope: performance property

{{APIRef("Performance API")}}{{AvailableInWorkers("worker")}}

The performance property of the {{domxref("WorkerGlobalScope")}} interface returns a {{domxref("Performance")}} object, which can be used to gather performance information about code running in the worker's scope.

Performance entries are per context. If you create a mark on a worker thread, you will not see it in the main thread or any other workers.

Note that only the following performance interfaces are available in worker contexts:

• {{domxref("Performance")}}
• {{domxref("PerformanceEntry")}}
• {{domxref("PerformanceMark")}}
• {{domxref("PerformanceMeasure")}}
• {{domxref("PerformanceObserver")}}
• {{domxref("PerformanceObserverEntryList")}}
• {{domxref("PerformanceResourceTiming")}}
• {{domxref("PerformanceServerTiming")}}

Value

A {{domxref("Performance")}} object offering access to performance and timing-related information for the context it is called on.

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• {{domxref("Window.performance")}}