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Speed up `Image.point()` and `Image.point_transform()` by akx · Pull Request #9743 · python-pillow/Pillow · GitHub

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Speed up Image.point() and Image.point_transform() - #9743

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akx:faster-point
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Speed up Image.point() and Image.point_transform()#9743
akx wants to merge 4 commits into
python-pillow:mainfrom
akx:faster-point

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akx commented Jun 30, 2026

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Refs #9649, #9675, #9736, #9737, #9738, #9739, #9740 (same series, same techniques).

Cf. the aforementioned PRs, this also does a couple other cleanups for performance; on my machine, using ImagingNewDirty gave another +10% on top of the first commit. The last commit would technically allow a compiler to inline the point functions, but given their size, a compiler probably won't.

akx changed the title Speed up Image.point() Speed up Image.point() and Image.point_transform() Jun 30, 2026

codspeed-hq Bot commented Jun 30, 2026 •
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Merging this PR will improve performance by 31.23%

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 8 improved benchmarks
✅ 547 untouched benchmarks
⏩ 335 skipped benchmarks1

Performance Changes

Benchmark BASE HEAD Efficiency
⚡ test_point_transform[1237x811-I] 9.7 ms 5 ms +93.38%
⚡ test_point_transform[1237x811-F] 7.2 ms 4.9 ms +46.87%
⚡ test_point_lut[1237x811-L] 4.7 ms 3.6 ms +31.88%
⚡ test_point_lut[1237x811-RGBA] 14.4 ms 11.8 ms +21.93%
⚡ test_point_transform[1237x811-RGBA] 14.7 ms 12.1 ms +21.36%
⚡ test_point_lut[1237x811-RGB] 12.7 ms 10.6 ms +19.14%
⚡ test_point_lut[1237x811-LA] 10.9 ms 9.5 ms +15.67%
⚡ test_point_transform[1237x811-LA] 11.2 ms 9.7 ms +15.16%

Tip

Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.

Comparing akx:faster-point (1000b1b) with main (c8c74c8)

Footnotes

  1. 335 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

akx marked this pull request as ready for review June 30, 2026 14:25
akx mentioned this pull request Jun 30, 2026
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hugovk mentioned this pull request Jul 1, 2026
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akx force-pushed the faster-point branch 2 times, most recently from c0dd7c5 to aaeb073 Compare July 5, 2026 18:37
akx mentioned this pull request Jul 29, 2026
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espressolee mentioned this pull request Aug 5, 2026
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hugovk commented Aug 9, 2026

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Rebased following benchmark image update: #9831.

radarhere reviewed Aug 27, 2026
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