[Webkit-unassigned] [Bug 200406] [results.webkit.org Timeline] Performance improvements

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200406

--- Comment #9 from Zhifei Fang <zhifei_fang at apple.com> ---
Just change the title, this patch now include multiple performance improvements for the canvas timeline.

1. Unhook the scroll event when a series/axis have been removed from the container 
2. Fix the axis's cache date structure out of sync.
3. Use position:sticky to reduce the blink when update the transform
4. Use intersection observer to detect if the canvas on screen or not, if a canvas is not on the screen, we do nothing, this will eliminate render requests we send out.

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