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hugovk merged 3 commits into from
Jul 1, 2026
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Add release notes for SBOM and performance improvements #9747

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Add release notes for performance improvements
radarhere Jun 30, 2026
5564ca7
List methods
radarhere Jul 1, 2026
13b701b
Add release notes for #9679
radarhere Jul 1, 2026
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15 changes: 15 additions & 0 deletions docs/releasenotes/12.3.0.rst
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Expand Up @@ -112,9 +112,24 @@ To help other projects prepare for Python 3.15, wheels are now built for the 3.1
as a preview. This is not official support for Python 3.15, but rather an opportunity
for you to test how Pillow works with the beta and report any problems.

SBOM in wheels
^^^^^^^^^^^^^^

Following :pep:`770`, the Software Bill-of-Materials (SBOM) has now been embedded into
Pillow's wheels.

Removed Python 3.13 free-threaded wheels
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Python 3.13 added an experimental free-threaded mode, and Pillow 11.0.0 added
corresponding wheels. Now that Python 3.14 includes official support for it, Pillow has
removed wheels for Python 3.13 free-threaded mode.

Performance improvements
^^^^^^^^^^^^^^^^^^^^^^^^

A number of changes have been made to optimize the use of C when manipulating images.
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This improves performance by up to 5.6 times of ``Image``'s
``alpha_composite``, ``fill``, ``filter``, ``getchannel``, ``linear_gradient``,
``matrix``, ``merge``, ``negative``, ``putalpha``, ``quantize``,
``radial_gradient``, ``resample``, ``split``, and ``ImageChops`` operations.