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Previously, after a layout was finished (or skipped in the case of repaint-only layout), both the stacking context tree and display list were built. In the case of repaint-only layout, we should be able to skip the reconstruction of the stacking context tree and only do display list building. This change does that, also generally cleaning and up and clarifying the data structure used during this phase of layout. This opens up the possibility of a new kind of incremental layout that does both repaint and a rebuild of the stacking context tree. On the blaster.html test case[^1], this reduces tightly-measured layout time from ~45-50 milliseconds to ~25-30 milliseconds on my M3. [^1]: https://gist.github.com/mrobinson/44ec87d028c0198917a7715a06dd98a0 Testing: There are currently no performance tests for layout. :( This should not modify the results of WPT tests. Signed-off-by: Martin Robinson <mrobinson@igalia.com> Co-authored-by: Oriol Brufau <obrufau@igalia.com> |
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| embedder | ||
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| net | ||
| profile | ||
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