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BLD: Try using shared memory utilities in Cython to reduce wheel sizes #61384

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  • closes #xxxx (Replace xxxx with the GitHub issue number)
  • Tests added and passed if fixing a bug or adding a new feature
  • All code checks passed.
  • Added type annotations to new arguments/methods/functions.
  • Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

@lithomas1 lithomas1 added the Build Library building on various platforms label May 1, 2025
@lithomas1 lithomas1 added this to the 2.3 milestone May 1, 2025
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lithomas1 commented May 1, 2025

around 10% savings in both compressed/uncompressed size
(1MB compressed, 4MB uncompressed)

scikit-learn seems to have gotten a lot more mileage out of this optimization...
(they report around 25% savings)

@lithomas1 lithomas1 marked this pull request as ready for review May 1, 2025 00:49
@@ -47,6 +47,24 @@ endif
cy = meson.get_compiler('cython')
if cy.version().version_compare('>=3.1.0')
add_project_arguments('-Xfreethreading_compatible=true', language: 'cython')

# Use shared utility code to reduce wheel sizes
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Cool seems useful. Is there any discussion to add this natively to Meson instead of custom-coding this ourselves?

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