Purpose: Records deviations in animation timing. This helps diagnose problems with web browser motion fluidity. Wait until the graph fills up， you will see erratic magenta/cyan color flicker instead of a steady flicker (at low Hz) or steady color (at high Hz). Alternatively，。

so some manual optimization will help: Visual Frame Skipping Indicator: If you enable this indicator。

and then take a screen shot of this web page. W3C Recommendation ， recommends HTML5 animations to be synchronized to refresh rate. See compliant browsers. Web browsers are extremely sensitive to stutters， use the separate Frame Skipping test too. NOTE: The Visual Frame Skipping Indicator should not be used by flicker-sensitive individuals. NEW: TestUFO 3.0+ improves precision of animation time graph to ~5-20µs in all major browsers. Scale settings under 1ms has been added. 。

you can visually watch for skipped frames to see if skipped frames co-relate with spikes. Successful browser frameskip self-detection is usually only relatively reliable with certain compositors (e.g. Windows + Primary Monitor). When a frameskip occurs， end of section 5。

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