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Speed up `Image.offset` by akx · Pull Request #9753 · python-pillow/Pillow · GitHub

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Speed up Image.offset - #9753

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akx:faster-offset
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Speed up Image.offset#9753
akx wants to merge 1 commit into
python-pillow:mainfrom
akx:faster-offset

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akx commented Jul 1, 2026

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As #9649, #9675, #9736, #9737, #9738, #9739, #9740, #9743 (same techniques).

codspeed-hq Bot commented Jul 1, 2026 •
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Merging this PR will improve performance by 42.24%

⚠️ 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

⚡ 4 improved benchmarks
✅ 551 untouched benchmarks
⏩ 335 skipped benchmarks1

Performance Changes

Benchmark BASE HEAD Efficiency
⚡ test_offset[1237x811-L] 8.5 ms 4.6 ms +84.8%
⚡ test_offset[1237x811-LA] 9.6 ms 7.3 ms +30.37%
⚡ test_offset[1237x811-RGB] 9.6 ms 7.3 ms +30.36%
⚡ test_offset[1237x811-RGBA] 9.6 ms 7.3 ms +30.34%

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-offset (6c4cec3) 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 July 1, 2026 17:51
radarhere reviewed Jul 4, 2026
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Comment thread src/libImaging/Offset.c Outdated
akx force-pushed the faster-offset branch from 4cb80ba to 53568b1 Compare July 4, 2026 10:30
akx force-pushed the faster-offset branch from 53568b1 to 20ecf42 Compare July 20, 2026 07:42
akx mentioned this pull request Jul 29, 2026
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hugovk commented Aug 9, 2026

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Rebased following benchmark image update: #9831.

Offset: apply hoist optimizations
6c4cec3 
Co-authored-by: Andrew Murray <3112309+radarhere@users.noreply.github.com>
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