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gh-139038: Add whatsnew entry for jit unique reference tracking by eendebakpt · Pull Request #148572 · python/cpython · GitHub

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gh-139038: Add whatsnew entry for jit unique reference tracking #148572

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Fidget-Spinner merged 2 commits into from
Apr 15, 2026
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gh-139038: Add whatsnew entry for jit unique reference tracking #148572

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Add whatsnew entry for jit unique reference tracking
eendebakpt Apr 14, 2026
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Update Doc/whatsnew/3.15.rst
Fidget-Spinner Apr 15, 2026
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6 changes: 5 additions & 1 deletion Doc/whatsnew/3.15.rst
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Expand Up @@ -1462,8 +1462,12 @@ reduces the cost of most operations in Python.
(Contributed by Ken Jin, Donghee Na, Zheao Li, Hai Zhu, Savannah Ostrowski,
Reiden Ong, Noam Cohen, Tomas Roun, PuQing, Cajetan Rodrigues, and Sacul in :gh:`134584`.)

By tracking unique references to objects, the JIT optimizer can now eliminate
reference count updates and perform inplace operations on ints and floats.
(Contributed by Reiden Ong, and Pieter Eendebak in :gh:`143414` and :gh:`146306`.)

The JIT optimizer now supports significantly more operations than in 3.14.
(Contributed by Kumar Aditya, Ken Jin, and Sacul in :gh:`131798`.)
(Contributed by Kumar Aditya, Ken Jin, Jiahao Li, and Sacul in :gh:`131798`.)

.. rubric:: Better machine code generation

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