This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
PerformanceFrameTiming is an abstract interface that provides frame timing data about the browser's event loop. A frame represents the amount of work a browser does in one event loop such as processing DOM events, resizing, scrolling, rendering, CSS animations, etc.. A frame rate of 60fps (frames per second) for a 60Hz refresh rate is the target for a good responsive user experience. This means the browser should process a frame in about 16.7ms.An application can register a PerformanceObserver for "frame" performance entry types and the observer can retrieve data about the duration of each frame event. This information can be used to help identify areas that take too long to provide a good user experience.
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Properties
This interface has no properties but it extends the following PerformanceEntry properties (for "frame" performance entry types) by qualifying and constraining the properties as follows:
PerformanceEntry.entryType- Returns "
frame". PerformanceEntry.name- Returns the document's address.
PerformanceEntry.startTime- Returns the
timestampwhen the frame was started. PerformanceEntry.duration- Returns a
timestampindicating the difference between thestartTimes of two successive frames.
Methods
This interface has no methods.
Example
See the example in Using the Frame Timing API.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Frame Timing The definition of 'PerformanceFrameTiming' in that specification. |
Draft | Initial definition. |
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 | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome
No support
No
| Edge ? | Firefox
No support
No
| IE No support No | Opera No support No | Safari No support No | WebView Android
No support
No
| Chrome Android
No support
No
| Edge Mobile ? | Firefox Android No support No | Opera Android No support No | Safari iOS No support No | Samsung Internet Android ? |
Legend
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- Experimental. Expect behavior to change in the future.
- Experimental. Expect behavior to change in the future.
- See implementation notes.
- See implementation notes.