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Commits on Mar 24, 2026

• gh-146306: JIT: Optimize float operations by mutating uniquely-referenced operands in place (GH-146307)

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  eendebakpt

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  claude

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• gh-145866: Convert `DICT_MERGE` to leave its inputs on the stack to be cleaned up by `_POP_TOP` (GH-146329)

  NekoAsakura

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Commits on Mar 22, 2026

• gh-143414: Implement unique reference tracking for JIT, optimize unpacking of such tuples (GH-144300)

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  reidenong

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  Fidget-Spinner

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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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Commits on Mar 20, 2026

• gh-146099: Optimize _GUARD_CODE_VERSION+IP via function version symbols (GH-146101)

  Fidget-Spinner

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Commits on Mar 19, 2026

• gh-131798: JIT: optimize _LOAD_COMMON_CONSTANT (GH-146104)

  trdthg

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• gh-145866: Convert `SET_UPDATE` to leave its inputs on the stack to be cleaned up by `_POP_TOP` (GH-145979)

  Sacul0457

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Commits on Mar 17, 2026

• gh-146058: Fix _GUARD_CODE_VERSION_* (GH-146060)

  Fidget-Spinner

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• gh-131798: Optimize `_ITER_CHECK_RANGE` and `_ITER_CHECK_LIST` in the JIT (GH-144583)

  Sacul0457

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Commits on Mar 16, 2026

• gh-146018: Disable over-aggressive optimization for _GUARD_CODE_VERSION (GH-145923)

  Fidget-Spinner

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• gh-145866: Convert `CALL_INTRINSIC_1` to leave its inputs on the stack to be cleaned up by `_POP_TOP`. (GH-145964)

  Sacul0457

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Commits on Mar 14, 2026

• gh-134584: Eliminate redundant refcounting in JIT for `MATCH_CLASS` (GH-144821)

  Sacul0457

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Commits on Mar 11, 2026

• gh-144540: Add _MAKE_HEAP_SAFE uop to eliminate unnecessary refcount operations in RETURN_VALUE and YIELD_VALUE (GH-144414)

  cocolato

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Commits on Mar 3, 2026

• gh-145214: Narrow _GUARD_TOS_ANY_{SET,DICT} by using probable type (gh-145215)

  corona10

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Commits on Feb 24, 2026

• gh-145122: Add _GUARD_NOS_ANY_DICT to prevent STORE_SUBSCR_DICT on frozendict (gh-145039)

  corona10

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Commits on Feb 22, 2026

• Fix warnings on main (GH-145104)

  chris-eibl

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Commits on Feb 19, 2026

• GH-144651: Optimize the new uops added when recording values during tracing. (GH-144948)

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  markshannon

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Commits on Feb 14, 2026

• fix warnings in jit builds (GH-144817)

  chris-eibl

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Commits on Feb 10, 2026

• gh-134584: Optimize `_BINARY_OP_SUBSCR_LIST_SLICE` (GH-144659)

  Sacul0457

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Commits on Feb 8, 2026

• GH-131798: Optimize `_GUARD_TOS_SLICE` (GH-144470)

  Sacul0457

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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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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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Commits on Jan 30, 2026

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

  cocolato

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Commits on Jan 25, 2026

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

  aisk

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Commits on Jan 24, 2026

• gh-144140: Optimize len for string constants in optimizer (GH-144142)

  y1yang0

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• gh-130415: Narrow types to constants in branches involving specialized comparisons with a constant (GH-144150)

  reidenong

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

  aisk

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Commits on Jan 23, 2026

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

  aisk

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Commits on Jan 22, 2026

• GH-139109: Partial reworking of JIT data structures (GH-144105)

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  markshannon

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• gh-130415: Narrowing to constants in branches involving `is` comparisons with a constant (GH-143895)

  reidenong

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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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Commits on Jan 17, 2026

• gh-143421: Use new buffer to save optimized uops (GH-143682)

  cocolato

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• gh-143946: Show `JitOptSymbol` on abstract stack when set PYTHON_OPT_DEBUG > 4 (GH-143957)

  cocolato

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