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layout: Move overflow calculation to be a separate, sequential,

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bottom-up pass.

Right now, the only reason that overflow calculation works is that we
rely on script inducing extra reflows that are sent for display. This
was preventing #10021 from landing.

This change regresses layout performance by about 1% in my tests.

Fixes #7797 properly.
This commit is contained in:
Patrick Walton 2016-03-17 14:28:37 -07:00
parent 2d6283c64b
commit 5ea8c34276
7 changed files with 60 additions and 17 deletions
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components/profile/time.rs
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@ -60,6 +60,7 @@ impl Formattable for ProfilerCategory {
ProfilerCategory::LayoutGeneratedContent |
ProfilerCategory::LayoutDisplayListSorting |
ProfilerCategory::LayoutMain |
ProfilerCategory::LayoutStoreOverflow |
ProfilerCategory::LayoutDispListBuild |
ProfilerCategory::LayoutDamagePropagate |
ProfilerCategory::PaintingPerTile |
@ -83,6 +84,7 @@ impl Formattable for ProfilerCategory {
ProfilerCategory::LayoutDisplayListSorting => "Sorting Display List",
ProfilerCategory::LayoutGeneratedContent => "Generated Content Resolution",
ProfilerCategory::LayoutMain => "Primary Layout Pass",
ProfilerCategory::LayoutStoreOverflow => "Store Overflow",
ProfilerCategory::LayoutParallelWarmup => "Parallel Warmup",
ProfilerCategory::LayoutDispListBuild => "Display List Construction",
ProfilerCategory::PaintingPerTile => "Painting Per Tile",