[Webkit-unassigned] [Bug 193539] Implement asynchronous frame scrolling for iOS

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=193539

--- Comment #5 from Frédéric Wang (:fredw) <fred.wang at free.fr> ---
(In reply to Antti Koivisto from comment #4)
> (In reply to Frédéric Wang (:fredw) from comment #3)
> > Not sure how different this bug is, but FYI I had patches in bug 173833, bug
> > 192303, bug 182868 with various tests that were pending review.
> 
> Interesting! I wasn't aware of that patch. Looks very similar. The main
> differences seem to be
> 
> - this patch ties to asyncFrameScrollingEnabled internal setting and doesn't
> enable the feature by default
> - eliminates the unnecessary clip layer in async scrolling case
> (UIScrollView clips).
> - uses the same ScrolliongTreeFrameScrollingNode type for both main frame
> and subframe, switching operation based on the scroll layer type (so the
> setting also works)
> - is missing some of the bug fixes
> - doesn't add tests
> 
> I propose we land this version as a starting point that can be experimented
> with and then work towards integrating your tests and bug fixes. How does
> that sound?

OK, that sounds good to me. I think the two last points are important to have at some point :-)

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