RESOLVED FIXED310051
IntersectionObserver can get sluggish over time 
https://bugs.webkit.org/show_bug.cgi?id=310051
Summary IntersectionObserver can get sluggish over time
Ryosuke Niwa
Reported 2026-03-16 14:49:38 PDT
Just like ResizeObserver, IntersectionObserver could suffer from O(n^2) iteration when there are many elements being observed.
Attachments
Add attachment proposed patch, testcase, etc.
Ryosuke Niwa
Comment 1 2026-03-16 16:22:51 PDT
Pull request: https://github.com/WebKit/WebKit/pull/60727
EWS
Comment 2 2026-03-17 01:00:28 PDT
Committed 309387@main (64a3b9922821): <https://commits.webkit.org/309387@main> Reviewed commits have been landed. Closing PR #60727 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2026-03-17 01:01:14 PDT
<rdar://problem/172727210>
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