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1. Commits on Aug 19, 2026

   • [3.15] gh-148817: Fold long lists/sets of constant elements into constant tuples/frozensets (GH-149016) (#155897)

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2. Commits on Jun 11, 2026

   • [3.15] gh-151112: Move an `assert` that may fail in `cfg_builder_check` (GH-151153) (#151313)

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     miss-islington

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     StanFromIreland

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3. Commits on Jun 9, 2026

   • [3.15] gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127) (#151134)

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     miss-islington

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     sobolevn

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4. Commits on May 2, 2026

   • gh-148871: extend and improve `LOAD_COMMON_CONSTANT` (GH-148971)

     NekoAsakura

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     7c9ad27View commit details

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5. Commits on Apr 26, 2026

   • gh-146455: Fix O(N²) in add_const() after constant folding moved to CFG (#146456)

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     zSirius

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6. Commits on Apr 25, 2026

   • gh-148973: fix segfault on mismatch between consts size and oparg in compiler (#148974)

     iritkatriel

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     c650b51View commit details

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7. Commits on Apr 16, 2026

   • GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)

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     markshannon

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8. Commits on Mar 30, 2026

   • gh-126835: Fix _PY_IS_SMALL_INT() macro (#146631)

     vstinner

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9. Commits on Mar 21, 2026

   • GH-145667: Merge `GET_ITER` and `GET_YIELD_FROM_ITER` (GH-146120)

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     markshannon

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10. Commits on Jan 16, 2026

    • GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569)

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      markshannon

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11. Commits on Sep 17, 2025

    • gh-138714: Don't assume next block has instructions when propagating line numbers (#138770)

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      DinoV

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      iritkatriel

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12. Commits on Sep 8, 2025

    • gh-138679: Opcodes which consume no inputs should indicate they produced the val… (#138678)

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      DinoV

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13. Commits on Aug 29, 2025

    • gh-138250: load fast optimization should fall through to empty blocks (#138249)

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      DinoV

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14. Commits on Aug 13, 2025

    • gh-137681: Always initialize exception handler for new instruction (#137655)

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      DinoV

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15. Commits on Aug 5, 2025

    • gh-137288: Fix bug where boolean expressions are not associated with the correct exception handler (#137310)

      iritkatriel

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      1f2026bView commit details

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16. Commits on Jul 1, 2025

    • gh-134280: Disable constant folding for ~ with a boolean argument (GH-134982)

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      serhiy-storchaka

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      86c3316View commit details

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17. Commits on Jun 4, 2025

    • gh-134889: Fix handling of a few opcodes when optimizing `LOAD_FAST` (#134958)

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      mpage

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18. Commits on May 27, 2025

    • GH-132554: "Virtual" iterators (GH-132555)

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      markshannon

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19. Commits on May 5, 2025

    • gh-133371: Don't optimize `LOAD_FAST` instructions whose local is killed by `DELETE_FAST` (#133383)

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      mpage

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20. Commits on Apr 29, 2025

    • gh-132775: Add _PyCode_ReturnsOnlyNone() (gh-132981)

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      ericsnowcurrently

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21. Commits on Apr 28, 2025

    • gh-130907: Treat all module-level annotations as conditional (#131550)

      JelleZijlstra

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22. Commits on Apr 1, 2025

    • gh-130704: Strength reduce `LOAD_FAST{_LOAD_FAST}` (#130708)

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      mpage

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23. Commits on Mar 20, 2025

    • GH-130296: Remove `_PyOpcode_max_stack_effect` as it is no longer used (GH-131493)

      markshannon

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24. Commits on Mar 19, 2025

    • gh-126835: Move constant tuple folding from ast_opt to CFG (#130769)

      WolframAlph

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      75103d9View commit details

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25. Commits on Mar 14, 2025

    • gh-130480: Move duplicate `LOAD_SMALL_INT` optimization from codegen to CFG (#130481)

      WolframAlph

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      55815a6View commit details

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26. Commits on Mar 13, 2025

    • gh-130080: move _Py_EnsureArrayLargeEnough to a separate header so it can be used outside of the compiler (#130930)

      iritkatriel

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27. Commits on Mar 12, 2025

    • gh-126835: Avoid creating unnecessary tuple when looking for constant sequence during constant folding (#131054)

      WolframAlph

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28. Commits on Mar 10, 2025

    • GH-123044: Give the `POP_TOP` after a case test a location in the body, not the pattern. (GH-130627)

      markshannon

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29. Commits on Mar 7, 2025

    • GH-128534: Fix behavior of branch monitoring for `async for` (GH-130847)

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      markshannon

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30. Commits on Mar 2, 2025

    • gh-130740: Move some `stdbool.h` includes after `Python.h` (#130738)

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      chouquette

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31. Commits on Feb 21, 2025

    • gh-126835: Move constant unaryop & binop folding to CFG (#129550)

      WolframAlph

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32. Commits on Feb 14, 2025

    • gh-126835: Set location for noped out instructions after constant folding in CFG. (#130109)

      WolframAlph

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33. Commits on Feb 13, 2025

    • gh-126835: Move const folding of lists & sets from ast_opt.c to flowgraph.c (#130032)

      WolframAlph

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      140e69cView commit details

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34. Commits on Feb 9, 2025

    • gh-126835: Make CFG optimizer skip over NOP's when looking for const sequence construction (#129703)

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      WolframAlph

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      iritkatriel

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      91d9544View commit details

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35. Commits on Feb 7, 2025

    • gh-100239: replace BINARY_SUBSCR & family by BINARY_OP with oparg NB_SUBSCR (#129700)

      iritkatriel

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      a1417b2View commit details

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