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gh-91349: Replace zlib with zlib-ng in Windows build by zooba · Pull Request #131438 · python/cpython · GitHub

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gh-91349: Replace zlib with zlib-ng in Windows build #131438

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Merged
zooba merged 10 commits into from
Mar 19, 2025
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gh-91349: Replace zlib with zlib-ng in Windows build #131438

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de56164
gh-91349: Replace zlib with zlib-ng in Windows build
zooba Mar 19, 2025
1347c50
Updated readme.txt
zooba Mar 19, 2025
7fd8f26
Fix includes for PGO build
zooba Mar 19, 2025
f919749
Use correct include dirs
zooba Mar 19, 2025
fb6500d
Add NEWS
zooba Mar 19, 2025
89d44a1
Fix debug reference and some warnings
zooba Mar 19, 2025
08eecb1
Exclude Intel optimizations better on ARM64
zooba Mar 19, 2025
548daa7
Update docs and whatsnew
zooba Mar 19, 2025
f108044
Remove unresolved reference from docs
zooba Mar 19, 2025
085fa10
Include ZLIBNG_VERSION in pythoninfo
zooba Mar 19, 2025
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Update docs and whatsnew
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zooba committed Mar 19, 2025
commit 548daa7592b4a896dd5aa07b4e9b96ff26d7145c
12 changes: 12 additions & 0 deletions Doc/library/zlib.rst
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Expand Up @@ -330,6 +330,18 @@ the following constants:
.. versionadded:: 3.3


.. data:: ZLIBNG_VERSION

The version string of the zlib-ng library that was used for building the
module if zlib-ng was used. When present, the :data:`ZLIB_VERSION` and
:data:`ZLIB_RUNTIME_VERSION` constants reflect the version of the zlib API
provided by zlib-ng.

If zlib-ng was not used to build the module, this constant will be absent.

.. versionadded:: 3.14


.. seealso::

Module :mod:`gzip`
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13 changes: 13 additions & 0 deletions Doc/whatsnew/3.14.rst
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Expand Up @@ -1026,6 +1026,7 @@ zipinfo
to produce reproducible output.
(Contributed by Jiahao Li in :gh:`91279`.)


.. Add improved modules above alphabetically, not here at the end.

Optimizations
Expand Down Expand Up @@ -1078,6 +1079,18 @@ uuid
(Contributed by Bénédikt Tran in :gh:`128150`.)


zlib
----

* On Windows, ``zlib-ng`` is now used as the implementation of the
:mod:`zlib` module. This should produce compatible and comparable
results with better performance, though it is worth noting that
:const:`~zlib.Z_BEST_SPEED` (1) may result in significantly less
compression than the previous implementation (while also significantly
reducing the time taken to compress).
(Contributed by Steve Dower in :gh:`91349`.)


Deprecated
==========

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