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[Impeller] improved glyph hashing performance #44502
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Co-authored-by: Jonah Williams <[email protected]>
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…132159) flutter/engine@dd03fae...934ebb0 2023-08-08 [email protected] Roll Skia from 6fa6fdd04783 to 5c8c7faf9131 (3 revisions) (flutter/engine#44506) 2023-08-08 [email protected] Flutter iOS Interactive Keyboard: Handle Pointer Up (flutter/engine#44457) 2023-08-08 [email protected] [Impeller] improved glyph hashing performance (flutter/engine#44502) 2023-08-08 [email protected] Roll Skia from 30c0319e7e42 to 6fa6fdd04783 (2 revisions) (flutter/engine#44503) If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Please CC [email protected],[email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md
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This change makes the glyph hash 39% faster (66ms vs 107ms). The glyph hash function occupies the most CPU time on the raster thread when scrolling around the main screen for the Flutter Gallery ## before <img width="1101" alt="Screenshot 2023-08-08 at 10 53 06 AM" src="https://github.com/flutter/engine/assets/30870216/2332323e-80cd-4f39-9ec1-95cb5662be7b"> ## after <img width="1097" alt="Screenshot 2023-08-08 at 10 52 51 AM" src="https://github.com/flutter/engine/assets/30870216/13bbc07b-7f56-40e8-ada5-32de77ddf614"> [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style
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This change makes the glyph hash 39% faster (66ms vs 107ms). The glyph hash function occupies the most CPU time on the raster thread when scrolling around the main screen for the Flutter Gallery
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