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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

  authored
  3f37b94

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Commits on Feb 14, 2026

• fix warnings in jit builds (GH-144817)

  chris-eibl

  authored
  caac966

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Commits on Feb 9, 2026

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

  cocolato

  authored
  988286e

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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-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 29, 2026

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

  cocolato

  authored
  26996b5

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

  reidenong

  authored
  6d972e0

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

  Fidget-Spinner

  authored
  ca99bfd

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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 9, 2026

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

  Fidget-Spinner

  authored
  e0fb278

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• gh-143421: Lazily allocate tracer code and opt buffers (GH-143597)

  Fidget-Spinner

  authored
  b852236

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Commits on Jan 8, 2026

• gh-143421: Move `JitOptContext` from stack allocation to per-thread heap allocation (GH-143536)

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  cocolato

  and

  kumaraditya303

  authored
  aeb3403

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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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Commits on Dec 23, 2025

• gh-134584: Eliminate redundant refcounting from `_CALL_TYPE_1` (GH-135818)

  tomasr8

  authored
  25c294b

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Commits on Dec 15, 2025

• gh-134584: Remove custom float decref ops (GH-142576)

  Fidget-Spinner

  authored
  0ac4e6c

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Commits on Dec 8, 2025

• gh-142276: Watch attribute loads when promoting JIT constants (GH-142303)

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  3 peopleauthored
  97f0a1f

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Commits on Dec 4, 2025

• gh-141976: Check stack bounds in JIT optimizer (GH-142201)

  Fidget-Spinner

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  b3bf212

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Commits on Dec 3, 2025

• GH-141794: Limit size of generated machine code. (GH-142228)

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  markshannon

  authored
  62423c9

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Commits on Nov 13, 2025

• gh-139109: A new tracing JIT compiler frontend for CPython (GH-140310)

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  Fidget-Spinner

  authored
  4fa80ce

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Commits on Sep 18, 2025

• GH-138378: Move globals-to-consts pass into main optimizer pass (GH-138379)

  markshannon

  authored
  3b83257

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Commits on Sep 15, 2025

• gh-132732: Clear errors in JIT optimizer on error (GH-136048)

  Fidget-Spinner

  authored
  46f823b

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Commits on Sep 3, 2025

• gh-137136: Suppress build warnings when build on Windows with --experimental-jit-interpreter (GH-137137)

  aisk

  authored
  1ff2cbb

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Commits on Aug 20, 2025

• gh-137728 gh-137762: Fix bugs in the JIT with many local variables (GH-137764)

  Fidget-Spinner

  authored
  7fda8b6

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Commits on Jul 26, 2025

• GH-132732: Use pure op machinery to optimize `COMPARE_OP_INT/FLOAT/STR` (#137062)

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  savannahostrowski

  and

  Fidget-Spinner

  authored
  f7c380e

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Commits on Jun 27, 2025

• gh-132732: Automatically constant evaluate pure operations (GH-132733)

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  Fidget-Spinner

  and

  tomasr8

  authored
  695ab61

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Commits on Jun 23, 2025

• gh-134584: Specialize POP_TOP by reference and type in JIT (GH-135761)

  Fidget-Spinner

  authored
  569fc68

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Commits on Jun 20, 2025

• gh-135608: Add a null check for attribute promotion to fix a JIT crash (GH-135613)

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  Fidget-Spinner

  and

  devdanzin

  authored
  b53b0c1

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Commits on Jun 19, 2025

• GH-135379: Specialize int operations for compact ints only (GH-135668)

  markshannon

  authored
  9731dd2

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Commits on Jun 17, 2025

• gh-134584: Decref elimination for float ops in the JIT (GH-134588)

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  Fidget-Spinner

  authored
  fba5dde

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