RESOLVED FIXED310050
ResizeObserver is still sluggish over time 
https://bugs.webkit.org/show_bug.cgi?id=310050
Summary ResizeObserver is still sluggish over time
Ryosuke Niwa
Reported 2026-03-16 14:23:14 PDT
I've implemented some optimization in https://commits.webkit.org/309334@main but it's still quite a bit slower compared to Chrome.
Attachments
Add attachment proposed patch, testcase, etc.
Ryosuke Niwa
Comment 1 2026-03-16 14:26:51 PDT
Pull request: https://github.com/WebKit/WebKit/pull/60720
EWS
Comment 2 2026-03-16 21:33:23 PDT
Committed 309376@main (89c4bdc2aba0): <https://commits.webkit.org/309376@main> Reviewed commits have been landed. Closing PR #60720 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2026-03-16 21:34:12 PDT
<rdar://problem/172718139>
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