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c0f3ec8780
Parallel layout optimizations This takes some of the optimizations made to parallel styling in #16971 and applies them to parallel layout. Specifically: * Reduce the chunk size, to increase chances for parallelism on trees with small fan-out. * Reduce allocations by using SmallVec. * Reduce task switching by processing up to one chunk of children within the same rayon task as the parent. This cuts the "Primary Layout Pass" time in **half** on the MySpace page from [tp5n], and on my other real-world test pages it is a small improvement or close to no change. [tp5n]: https://wiki.mozilla.org/Buildbot/Talos/Tests#tp5n_pages_set --- - [x] `./mach build -d` does not report any errors - [x] `./mach test-tidy` does not report any errors - [x] These changes do not require tests because they affect performance only <!-- Reviewable:start --> --- This change is [<img src="https://reviewable.io/review_button.svg" height="34" align="absmiddle" alt="Reviewable"/>](https://reviewable.io/reviews/servo/servo/17192) <!-- Reviewable:end --> |
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| .. | ||
| animation.rs | ||
| block.rs | ||
| Cargo.toml | ||
| construct.rs | ||
| context.rs | ||
| data.rs | ||
| display_list_builder.rs | ||
| flex.rs | ||
| floats.rs | ||
| flow.rs | ||
| flow_list.rs | ||
| flow_ref.rs | ||
| fragment.rs | ||
| generated_content.rs | ||
| incremental.rs | ||
| inline.rs | ||
| layout_debug.rs | ||
| lib.rs | ||
| linked_list.rs | ||
| list_item.rs | ||
| model.rs | ||
| multicol.rs | ||
| opaque_node.rs | ||
| parallel.rs | ||
| persistent_list.rs | ||
| query.rs | ||
| sequential.rs | ||
| table.rs | ||
| table_caption.rs | ||
| table_cell.rs | ||
| table_colgroup.rs | ||
| table_row.rs | ||
| table_rowgroup.rs | ||
| table_wrapper.rs | ||
| text.rs | ||
| traversal.rs | ||
| webrender_helpers.rs | ||
| wrapper.rs | ||
