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Commits on May 11, 2026

• gh-145235: Make dict watcher API thread-safe for free-threaded builds (gh-145233)

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  yoney

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Commits on May 3, 2026

• gh-149217: Avoid adding dependencies on immutable, immortal classes in the JIT (GH149256)

  Wulian233

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Commits on Apr 27, 2026

• GH-146073: Add fitness to executor dumps. (GH-148959)

  markshannon

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Commits on Apr 14, 2026

• gh-148510: restore `func_version` check in `_LOAD_ATTR_PROPERTY_FRAME` (GH-148528)

  NekoAsakura

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Commits on Apr 12, 2026

• gh-146261: JIT: protect against function version changes (#146300)

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  Fidget-Spinner

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  kumaraditya303

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• gh-148393: Use atomic ops on _ma_watcher_tag in free threading build (gh-148397)

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  colesbury

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Commits on Apr 11, 2026

• gh-131798: do not watch immutable types in JIT (#148383)

  kumaraditya303

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• gh-148211: decompose `_POP_TWO/_POP_CALL(_ONE/_TWO)` in JIT (GH-148377)

  NekoAsakura

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• gh-148211: decompose `[_POP_TWO/_INSERT_2]_LOAD_CONST_INLINE_BORROW` in JIT (GH-148357)

  NekoAsakura

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Commits on Apr 10, 2026

• gh-148171: Convert CALL_BUILTIN_FAST to leave inputs on the stack for refcount elimination in JIT (GH-148172)

  Fidget-Spinner

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• gh-148211: decompose `[_POP_CALL_X/_SHUFFLE_2]_LOAD_CONST_INLINE_BORROW` in JIT (GH-148313)

  NekoAsakura

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Commits on Apr 9, 2026

• gh-148211: decompose `_INSERT_1_LOAD_CONST_INLINE(_BORROW)` in JIT (GH-148283)

  NekoAsakura

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• gh-131798: fold super method lookups in JIT (#148231)

  kumaraditya303

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• gh-148211: refactor bool to explicit uops in JIT (GH-148258)

  NekoAsakura

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Commits on Apr 8, 2026

• gh-148211: decompose `_POP_TOP_LOAD_CONST_INLINE(_BORROW)` in JIT (GH-148230)

  NekoAsakura

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• gh-148235: remove duplicate uops `_LOAD_CONST_UNDER_INLINE(_BORROW)` in JIT (GH-148236)

  NekoAsakura

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Commits on Apr 4, 2026

• gh-148083: Prevent constant folding when lhs is container types (gh-148090)

  corona10

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• gh-148083: Constant-fold _CONTAINS_OP_SET for frozenset (gh-148084)

  corona10

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Commits on Mar 30, 2026

• gh-146558: JIT optimize dict access for objects with known hash (#146559)

  kumaraditya303

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Commits on Mar 26, 2026

• gh-GH-131798: optimize jit attribute loads on immutable types (#146449)

  kumaraditya303

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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 3, 2026

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

  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 14, 2026

• fix warnings in jit builds (GH-144817)

  chris-eibl

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Commits on Feb 9, 2026

• gh-144623: Fix missing output uops in optimizer debug output (GH-144617)

  cocolato

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  988286eView commit details

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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-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 29, 2026

• gh-143946: Add more debug info in `optimize_uops` (GH-144262)

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

  reidenong

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• gh-144016: Fix bad stack assert in the JIT optimizer (GH-144019)

  Fidget-Spinner

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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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