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GH-139922: update 3.15 whatsnew: Windows 64-bit binaries now use the tail-calling interpreter #146391

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Merged
hugovk merged 8 commits into from
Mar 27, 2026
+19 −13
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GH-139922: update 3.15 whatsnew: Windows 64-bit binaries now use the tail-calling interpreter #146391

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682055e
update 3.15 whatsnew: Windows 64-bit binaries
chris-eibl Mar 24, 2026
22277d9
ref link the new tail-calling interpreter
chris-eibl Mar 24, 2026
66ad26d
use issue instead of PR
chris-eibl Mar 24, 2026
f1415a7
Update Doc/whatsnew/3.15.rst
chris-eibl Mar 25, 2026
84fb115
Update Doc/whatsnew/3.15.rst
chris-eibl Mar 25, 2026
b3c2f08
add to release highlights
chris-eibl Mar 26, 2026
ebe2ad9
Merge the two news entries
chris-eibl Mar 26, 2026
cc4302d
add Steve again. yes yes yes!
chris-eibl Mar 26, 2026
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14 changes: 13 additions & 1 deletion Doc/whatsnew/3.15.rst
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Expand Up @@ -84,7 +84,8 @@ Summary -- Release highlights
<whatsnew315-pybyteswriter>`
* :ref:`The JIT compiler has been significantly upgraded <whatsnew315-jit>`
* :ref:`Improved error messages <whatsnew315-improved-error-messages>`

* :ref:`The official Windows 64-bit binaries now use the tail-calling interpreter
<whatsnew315-windows-tail-calling-interpreter>`

New features
============
Expand Down Expand Up @@ -1943,6 +1944,17 @@ Build changes
and :option:`-X dev <-X>` is passed to the Python or Python is built in :ref:`debug mode <debug-build>`.
(Contributed by Donghee Na in :gh:`141770`.)

.. _whatsnew315-windows-tail-calling-interpreter:

* The official Windows 64-bit binaries on python.org__ now use the new
:ref:`tail-calling interpreter <whatsnew314-tail-call-interpreter>`.
(Contributed by Ken Jin, Brandt Bucher and Chris Eibl in :gh:`139922`.
Special thanks go to Steve Dower for his assistance with the integration in the
Windows release build process and to the MSVC team including Hulon Jenkins
for ``msvc::musttail``.)

__ https://www.python.org/downloads/windows/


Porting to Python 3.15
======================
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