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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 19, 2026

• 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 18, 2026

• gh-146092: Fix error handling in _BINARY_OP_ADD_UNICODE opcode (#146117)

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  vstinner

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Commits on Mar 17, 2026

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

  Fidget-Spinner

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Commits on Mar 16, 2026

• gh-127958: Trace from RESUME in the JIT (GH-145905)

  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 12, 2026

• GH-145692: Convert DEOPT_IFs to EXIT_IFs (GH-145751)

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  markshannon

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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 Mar 2, 2026

• gh-144569: Avoid creating temporary objects in `BINARY_SLICE` for list, tuple, and unicode (GH-144590)

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  cocolato

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Commits on Feb 25, 2026

• gh-145197: Fix JIT trace crash when recording function from cleared generator frame (GH-145220)

  cocolato

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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 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 18, 2026

• gh-141510: Update specializer to support frozendict (gh-144949)

  corona10

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Commits on Feb 12, 2026

• gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)

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  4 peopleauthored
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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 6, 2026

• gh-144549: Fix tail calling interpreter on Windows for FT (GH-144550)

  Fidget-Spinner

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• gh-139103: Improve namedtuple scaling in free-threaded build (gh-144332)

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  colesbury

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  vstinner

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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 27, 2026

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

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  colesbury

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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-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 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 18, 2026

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

  aisk

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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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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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