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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

  authored
  b53fc7c

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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

  authored
  89e6607

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

  markshannon

  authored
  141fd8b

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

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  cocolato

  authored
  ebbb2ca

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Commits on Jan 30, 2026

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

  cocolato

  authored
  1dc12b2

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Commits on Jan 25, 2026

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

  aisk

  authored
  6e55337

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Commits on Jan 24, 2026

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

  y1yang0

  authored
  979d92f

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

  reidenong

  authored
  6d972e0

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

  aisk

  authored
  4e10fa9

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Commits on Jan 23, 2026

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

  aisk

  authored
  2f42f83

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Commits on Jan 22, 2026

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

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  markshannon

  authored
  d77aaa7

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

  reidenong

  authored
  0b08438

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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

  authored
  9eab67d

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Commits on Jan 17, 2026

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

  cocolato

  authored
  b4b7324

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

  cocolato

  authored
  61ec66a

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Commits on Jan 13, 2026

• gh-131798: JIT optimizer: Support custom binary op and property frames (GH-143735)

  Fidget-Spinner

  authored
  2873c31

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Commits on Jan 12, 2026

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

  reidenong

  authored
  c556786

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

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  Zheaoli

  authored
  e535bdb

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

  caje731

  authored
  054a565

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Commits on Jan 11, 2026

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

  Fidget-Spinner

  authored
  548526b

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Commits on Jan 9, 2026

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

  Fidget-Spinner

  authored
  9525911

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Commits on Jan 6, 2026

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

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  Zheaoli

  authored
  0a5c04a

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

  Fidget-Spinner

  authored
  df35534

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• gh-131798: Support generator frames in the JIT optimizer (GH-143340)

  Fidget-Spinner

  authored
  90c44bc

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

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  reidenong

  and

  Fidget-Spinner

  authored
  54f1ed0

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Commits on Jan 4, 2026

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

  chris-eibl

  authored
  e6bfe4d

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Commits on Jan 2, 2026

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

  Fidget-Spinner

  authored
  f7a03bb

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

  corona10

  authored
  315f474

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Commits on Jan 1, 2026

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

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  Zheaoli

  and

  Fidget-Spinner

  authored
  d00d39f

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

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  corona10

  and

  Fidget-Spinner

  authored
  1fb8e0e

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Commits on Dec 28, 2025

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

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  tomasr8

  authored
  713684d

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Commits on Dec 26, 2025

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

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  cocolato

  authored
  a1c6308

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

  cocolato

  authored
  b3f2d80

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Commits on Dec 24, 2025

• gh-143092: Make CALL_LIST_APPEND and BINARY_OP_INPLACE_ADD_UNICODE normal instructions (GH-143124)

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  Fidget-Spinner

  authored
  cf6758f

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