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1. Commits on Feb 5, 2026

   • GH-144179: Use recorded values to make optimizer more robust (GH-144437)

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     markshannon

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2. Commits on Feb 2, 2026

   • gh-139109: Replace `_CHECK_STACK_SPACE` with `_CHECK_STACK_SPACE_OPERAND` in JIT optiimizer (GH-144394)

     cocolato

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   • GH-144179: Add value recording to JIT tracing front-end (GH-144303)

     markshannon

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   • gh-144145: Revert PR#144122 for performance and potential bugs. (GH-144391)

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     cocolato

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3. Commits on Jan 30, 2026

   • gh-144145: Track nullness of properties in the Tier 2 JIT optimizer (GH-144122)

     cocolato

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4. Commits on Jan 27, 2026

   • gh-144289: Remove ENABLE_SPECIALIZATION_FT (gh-144290)

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     colesbury

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5. Commits on Jan 25, 2026

   • gh-143995: Eliminate redundant refcounting in the JIT from LOAD_ATTR_MODULE (GH-143996)

     aisk

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6. Commits on Jan 24, 2026

   • gh-144007: Eliminate redundant refcounting in the JIT for BINARY_OP (GH-144011)

     aisk

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7. Commits on Jan 23, 2026

   • gh-144005: Eliminate redundant refcounting in the JIT for BINARY_OP_EXTEND (#144006)

     aisk

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8. Commits on Jan 21, 2026

   • GH-138245: Perform boolean guards by testing a single bit, rather than a full pointer comparison. (GH-143810)

     markshannon

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9. Commits on Jan 18, 2026

   • gh-144012: Check null binary op extend (#144014)

     aisk

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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 Jan 14, 2026

    • gh-143123: Protect against recursive tracer calls/finalization (GH-143126)

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      Fidget-Spinner

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    • gh-138050: Use cold flag instead of warm flag in `MAKE_WARM` (GH-143827)

      cocolato

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12. Commits on Jan 12, 2026

    • gh-134584: Eliminate redundant refcounting in TO_BOOL_INT, TO_BOOL_LIST (GH-143759)

      reidenong

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      c556786View commit details

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    • gh-134584: Eliminate redundant refcounting from `_CONTAINS_{OP|OP_SET|OP_DICT}` (GH-143731)

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      Zheaoli

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    • gh-134584: JIT: Remove redundant refcount for _BINARY_OP_SUBSCR_DICT (GH-143724)

      caje731

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13. Commits on Jan 11, 2026

    • gh-134584: JIT: Remove redundant refcounting for UNARY_{INVERT|NEGATIVE} (GH-143704)

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14. Commits on Jan 10, 2026

    • gh-143604: Hold strong reference to executor during JIT tracing (GH-143646)

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      Zheaoli

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      Fidget-Spinner

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15. Commits on Jan 9, 2026

    • gh-142764: Restore REPLACE_OPCODE_IF_EVALUATES_PURE optimization for some ops (GH-143335)

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    • gh-143421: Allocate all JIT state in one go (GH-143626)

      Fidget-Spinner

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16. Commits on Jan 8, 2026

    • gh-142908: Don't use `DK_IS_UNICODE` in interpreter (gh-142909)

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      colesbury

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17. Commits on Jan 7, 2026

    • gh-143531: Use macro to check if PEP 523 is hooked (#143532)

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      DinoV

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18. Commits on Jan 6, 2026

    • gh-134584: Eliminate redundant refcounting from `TO_BOOL_STR` (GH-143417)

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      Zheaoli

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    • gh-142982: Specialize CALL_FUNCTION_EX (GH-143391)

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    • gh-134584: Eliminate redundant refcounting in TO_BOOL_ALWAYS_TRUE (GH-143427)

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      reidenong

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      Fidget-Spinner

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19. Commits on Jan 4, 2026

    • gh-139757: Add BINARY_OP_SUBSCR_USTR_INT (GH-143389)

      chris-eibl

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    • gh-143403: Fix a UAF in `_BINARY_OP_INPLACE_ADD_UNICODE` (GH-143404)

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      Fidget-Spinner

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20. Commits on Jan 2, 2026

    • gh-134584: JIT: Remove redundant refcount from STORE_FAST (GH-143336)

      Fidget-Spinner

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    • gh-139757: Add _GUARD_NOS_COMPACT_ASCII for compact ascii optimization (gh-143332)

      corona10

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21. Commits on Jan 1, 2026

    • gh-134584: Eliminate redundant refcounting from `_LOAD_ATTR_SLOT` (GH-143320)

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      Zheaoli

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      Fidget-Spinner

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    • gh-134584: Eliminate redundant refcounting from _CALL{_BUILTIN_O, _METHOD_DESCRIPTOR_O} (GH-143330)

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      corona10

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      Fidget-Spinner

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22. Commits on Dec 28, 2025

    • gh-131798: Remove bounds check when indexing into tuples with a constant index (#137607)

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      tomasr8

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23. Commits on Dec 26, 2025

    • gh-134584: Eliminate redundant refcounting from `IS_OP` (GH-143171)

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      cocolato

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    • gh-134584: Eliminate redundant refcounting from `_COMPARE_OP_X` (GH-143186)

      cocolato

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