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LibWeb: Reduce paintable tree traversals during hit-testing

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By storing a list of positioned and floating descendants within the
stacking context tree node, we can eliminate the need for costly
paintable tree traversals during hit-testing.

This optimization results in hit-testing being 2 to 2.5 times faster
on https://ziglang.org/documentation/master/
This commit is contained in:
Aliaksandr Kalenik 2024-03-01 11:54:44 +01:00 • committed by Andreas Kling
parent 9c6c3fe0d8
commit 2764966ccc
5 changed files with 95 additions and 77 deletions
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6
Tests/LibWeb/Text/expected/hit_testing/positioned-z-index-0-and-floats.txt Normal file
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@ -0,0 +1,6 @@
1 2 <DIV id="aa" >
<DIV id="a" >
<DIV id="bb" >
<DIV id="b" >
<DIV id="d" >
<DIV id="container" >