Frame Timing API

This specification defines an interface to help web developers measure the rendering performance of their applications in the wild. The API provides frame performance data, as experienced by the end user on their device, to facilitate smoothness measurements (i.e. Frames per Second and Time to Frame). This is done by capturing events for main frame and impl (compositor) thread actions, and exposing them to JavaScript via the Performance Timeline.


API was previously named "Smoothness Timing"



Editor's draft

Status in Chromium


Proposed (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Last updated on 2020-09-09