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dom: Optimize IFrameCollection::validate (#38196)

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The `IFrameCollection` was previously rebuilt too often. This PR tries
to address the todo, to only rebuild the IFrameCollection when
necessary.

Testing: `CSS Selector Invalidation: :has() invalidation should not be
O(n^2)` wpt-test changed status from timeout to failed.
Fixes: #38131 (IFrameCollection::validate accounts for 30% of script
time in DOM heavy scenarios)


Co-authored-by: sharpshooter_pt <ibluegalaxy_taoj@163.com>

Signed-off-by: Jonathan Schwender <schwenderjonathan@gmail.com>
This commit is contained in:
Jonathan Schwender 2025-07-22 11:54:16 +08:00 • committed by GitHub
parent 03ab419793
commit 97f544aa20
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4 changed files with 46 additions and 14 deletions
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16
tests/wpt/meta/css/selectors/invalidation/has-complexity.html.ini vendored
View file

@ -1,4 +1,18 @@
[has-complexity.html]
expected: TIMEOUT
[Before appending 25000 elements]
expected: FAIL
[After appending 25000 elements. This should not time out.]
expected: FAIL
[After appending another 25000 elements. This should not time out.]
expected: FAIL
[After appending div with 25000 elements. This should not time out.]
expected: FAIL
[After removing div with 25000 elements. This should not time out.]
expected: FAIL
[After removing 25000 elements one-by-one. This should not time out.]
expected: FAIL