Speed up `alpha_composite`, `matrix`, `negative`, `quantize` - #9740

Merged

hugovk merged 6 commits into

python-pillow:mainfrom

akx:faster-loops-small

Jul 1, 2026

Commits on Jun 30, 2026

Rename test_alpha_composition benchmark to test_alpha_composite; exercise composition variants better
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AlphaComposite: apply hoist/restrict optimizations
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3c175ed
Matrix: apply hoist/restrict optimizations
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bcb6644
Matrix: note that `m` won't be written to and must have 12 members (even in L mode)
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b46c893
Negative: apply hoist/restrict optimizations
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Quantize: apply hoist optimizations
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