[Webkit-unassigned] [Bug 211839] [Web Animations] Use CA animations when playbackRate != 1 and direction != normal

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=211839

--- Comment #4 from Matt Perry <mattgperry at gmail.com> ---
In creating a library built upon WAAPI the only bugs I've encountered are in Webkit, and the majority of those have involved accelerated animations.

These aren't bugs I can reasonably ship to users, and setting playbackRate to 1.000001 to force animations onto the main thread in Webkit has fixed them all.

If this ticket gets resolved can you also offer a way to flag to Webkit that an animation shouldn't run on the main thread? Because looking through many of the tickets here, and indeed the linked bug in this one, a quick fix has often been to add conditions when an animation shouldn't run on Core Animation. It would be great if you could extend to developers this same opportunity, as I'm concerned that my hacky solution will re-expose users to timing bugs if they're not fixed before this ticket is resolved.

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