[Webkit-unassigned] [Bug 247782] Very slow DOM rendering of large (plain text/json) URLs

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=247782

zalan <zalan at apple.com> changed:

           What    |Removed                     |Added
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                 CC|                            |rniwa at webkit.org

--- Comment #4 from zalan <zalan at apple.com> ---
(In reply to Vladimir Prelovac from comment #3)
> @zalan
> 
> Thanks for looking into it!
> 
> One more observation I made while testing is that document.write() was about
> 25% faster than document.body.innerHTML=() for this use case. Any thoughts
> on this and what is in principle the fastest way to get (large) content into
> DOM?
That sounds like a question to a DOM person. rniwa, do you have some insight on this?

> 
> Also can you easilly identify what kind of other content goes down the
> legacy rendering path, would be curious to test and provide more input!
There's a visual indicator. It's a reddish glow (text-shadow) around the inline content when enabled through Safari's Debug menu (Debug -> Layout flags -> show legacy line layout coverage) https://www.droidwin.com/enable-safari-debug-menu-in-macos-monterey/

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