NEW 268116
Avoid compositing layers for opacity:0 subtrees 
https://bugs.webkit.org/show_bug.cgi?id=268116
Summary Avoid compositing layers for opacity:0 subtrees
Matt Woodrow
Reported 2024-01-25 15:39:44 PST
Creating compositing layers takes time, and also prevents backing store sharing from working when it otherwise could. We should be able to skip these while opacity is 0.
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Radar WebKit Bug Importer
Comment 1 2024-01-25 15:39:53 PST
<rdar://problem/121627710>
Matt Woodrow
Comment 2 2024-01-25 15:47:05 PST
Pull request: https://github.com/WebKit/WebKit/pull/23265
Simon Fraser (smfr)
Comment 3 2024-01-25 16:11:44 PST
One reason we've avoided doing this in the past is to avoid hiccups when animating away from opacity 0.
Matt Woodrow
Comment 4 2024-01-25 16:22:22 PST
I'd argue that this is the purpose of will-change (which isn't handled in the PR currently, but should be). I realise that it's definitely a perf compat risk though :(
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