Open
Bug 1848765
Opened 1 year ago
Updated 1 year ago
nsDisplayList::Sort should use nsTArray::StableSort
Categories
(Core :: Web Painting, enhancement)
Core
Web Painting
Tracking
()
NEW
People
(Reporter: smaug, Unassigned)
References
(Blocks 1 open bug)
Details
(Whiteboard: [sp3])
Currently the method uses std::stable_sort on top of nsTArray
https://searchfox.org/mozilla-central/rev/ce049e593c7d062a039938cabccaab4c14b8ebfd/layout/painting/nsDisplayList.h#3197
That triggers ElementAt calls which do bound checks.
nsTArray::StableSort would avoid that.
https://bugzilla.mozilla.org/show_bug.cgi?id=1668200 has a similar fix for some animation code.
The ElementAt calls do show up in the profiles
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Updated•1 year ago
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See Also: → https://mozilla-hub.atlassian.net/browse/SP3-498
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Updated•1 year ago
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Component: Layout → Web Painting
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Description
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