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The Python programming language

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/ Python/optimizer_bytecodes.c
0575ce936d3f16ce2547ba17d2a22d90369779b5
March 14, 2026
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gh-134584: Eliminate redundant refcounting in JIT for `MATCH_CLASS` (GH-144821)
Sacul committed
798070d
March 11, 2026
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gh-144540: Add _MAKE_HEAP_SAFE uop to eliminate unnecessary refcount operations in RETURN_VALUE and YIELD_VALUE (GH-144414)
Hai Zhu committed
f062014
March 3, 2026
D
gh-145214: Narrow _GUARD_TOS_ANY_{SET,DICT} by using probable type (gh-145215)
Donghee Na committed
6908372
February 24, 2026
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gh-145122: Add _GUARD_NOS_ANY_DICT to prevent STORE_SUBSCR_DICT on frozendict (gh-145039)
Donghee Na committed
0f759f1
February 22, 2026
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Fix warnings on main (GH-145104)
Chris Eibl committed
5944a53
February 19, 2026
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GH-144651: Optimize the new uops added when recording values during tracing. (GH-144948)
Mark Shannon committed
3f37b94
February 14, 2026
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fix warnings in jit builds (GH-144817)
Chris Eibl committed
caac966
February 10, 2026
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gh-134584: Optimize `_BINARY_OP_SUBSCR_LIST_SLICE` (GH-144659)
Sacul committed
6c8ca1c
February 8, 2026
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GH-131798: Optimize `_GUARD_TOS_SLICE` (GH-144470)
Sacul committed
cfeede8
February 5, 2026
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GH-144179: Use recorded values to make optimizer more robust (GH-144437)
Mark Shannon committed
b53fc7c
February 2, 2026
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gh-139109: Replace `_CHECK_STACK_SPACE` with `_CHECK_STACK_SPACE_OPERAND` in JIT optiimizer (GH-144394)
Hai Zhu committed
89e6607
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GH-144179: Add value recording to JIT tracing front-end (GH-144303)
Mark Shannon committed
141fd8b
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gh-144145: Revert PR#144122 for performance and potential bugs. (GH-144391)
Hai Zhu committed
ebbb2ca
January 30, 2026
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gh-144145: Track nullness of properties in the Tier 2 JIT optimizer (GH-144122)
Hai Zhu committed
1dc12b2
January 25, 2026
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gh-143995: Eliminate redundant refcounting in the JIT from LOAD_ATTR_MODULE (GH-143996)
AN Long committed
6e55337
January 24, 2026
Y
gh-144140: Optimize len for string constants in optimizer (GH-144142)
Yi Yang committed
979d92f
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gh-130415: Narrow types to constants in branches involving specialized comparisons with a constant (GH-144150)
reiden committed
6d972e0
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gh-144007: Eliminate redundant refcounting in the JIT for BINARY_OP (GH-144011)
AN Long committed
4e10fa9
January 23, 2026
A
gh-144005: Eliminate redundant refcounting in the JIT for BINARY_OP_EXTEND (#144006)
AN Long committed
2f42f83
January 22, 2026
M
GH-139109: Partial reworking of JIT data structures (GH-144105)
Mark Shannon committed
d77aaa7
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gh-130415: Narrowing to constants in branches involving `is` comparisons with a constant (GH-143895)
reiden committed
0b08438
January 21, 2026
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GH-138245: Perform boolean guards by testing a single bit, rather than a full pointer comparison. (GH-143810)
Mark Shannon committed
9eab67d
January 17, 2026
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gh-143421: Use new buffer to save optimized uops (GH-143682)
Hai Zhu committed
b4b7324
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gh-143946: Show `JitOptSymbol` on abstract stack when set PYTHON_OPT_DEBUG > 4 (GH-143957)
Hai Zhu committed
61ec66a
January 13, 2026
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gh-131798: JIT optimizer: Support custom binary op and property frames (GH-143735)
Ken Jin committed
2873c31
January 12, 2026
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gh-134584: Eliminate redundant refcounting in TO_BOOL_INT, TO_BOOL_LIST (GH-143759)
reiden committed
c556786
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gh-134584: Eliminate redundant refcounting from `_CONTAINS_{OP|OP_SET|OP_DICT}` (GH-143731)
Nadeshiko Manju committed
e535bdb
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gh-134584: JIT: Remove redundant refcount for _BINARY_OP_SUBSCR_DICT (GH-143724)
Cajetan Rodrigues committed
054a565
January 11, 2026
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gh-134584: JIT: Remove redundant refcounting for UNARY_{INVERT|NEGATIVE} (GH-143704)
Ken Jin committed
548526b
January 9, 2026
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gh-142764: Restore REPLACE_OPCODE_IF_EVALUATES_PURE optimization for some ops (GH-143335)
Ken Jin committed
9525911
January 6, 2026
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gh-134584: Eliminate redundant refcounting from `TO_BOOL_STR` (GH-143417)
Nadeshiko Manju committed
0a5c04a
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gh-142982: Specialize CALL_FUNCTION_EX (GH-143391)
Ken Jin committed
df35534
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gh-131798: Support generator frames in the JIT optimizer (GH-143340)
Ken Jin committed
90c44bc
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gh-134584: Eliminate redundant refcounting in TO_BOOL_ALWAYS_TRUE (GH-143427)
reiden committed
54f1ed0
January 4, 2026
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gh-139757: Add BINARY_OP_SUBSCR_USTR_INT (GH-143389)
Chris Eibl committed
e6bfe4d
January 2, 2026
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gh-134584: JIT: Remove redundant refcount from STORE_FAST (GH-143336)
Ken Jin committed
f7a03bb
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gh-139757: Add _GUARD_NOS_COMPACT_ASCII for compact ascii optimization (gh-143332)
Donghee Na committed
315f474
January 1, 2026
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gh-134584: Eliminate redundant refcounting from `_LOAD_ATTR_SLOT` (GH-143320)
Nadeshiko Manju committed
d00d39f
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gh-134584: Eliminate redundant refcounting from _CALL{_BUILTIN_O, _METHOD_DESCRIPTOR_O} (GH-143330)
Donghee Na committed
1fb8e0e
December 28, 2025
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gh-131798: Remove bounds check when indexing into tuples with a constant index (#137607)
Tomas R. committed
713684d
December 26, 2025
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gh-134584: Eliminate redundant refcounting from `IS_OP` (GH-143171)
Hai Zhu committed
a1c6308
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gh-134584: Eliminate redundant refcounting from `_COMPARE_OP_X` (GH-143186)
Hai Zhu committed
b3f2d80
December 24, 2025
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gh-143092: Make CALL_LIST_APPEND and BINARY_OP_INPLACE_ADD_UNICODE normal instructions (GH-143124)
Ken Jin committed
cf6758f
December 23, 2025
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gh-134584: Eliminate redundant refcounting from `_BINARY_OP_SUBSCR_TUPLE_INT` (GH-143094)
Hai Zhu committed
cc48bf0
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gh-134584: Eliminate redundant refcounting from `_CALL_TYPE_1` (GH-135818)
Tomas R. committed
25c294b
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gh-134584: Eliminate redundant refcounting from `_LOAD_ATTR_WITH_HINT` (GH-143062)
Hai Zhu committed
5b5ee3c
December 19, 2025
K
gh-134584: JIT: Borrow references for immortal promoted globals (GH-142921)
Ken Jin committed
6b4bc6e
K
gh-142961: Fix constant folding len(tuple) in JIT (GH-142963)
Ken Jin committed
786f464
December 18, 2025
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GH-134584: Remove redundant refcount for `BINARY_OP_SUBSCR_STR_INT` (#142844)
Savannah Ostrowski committed
1391ee6
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gh-134584: Eliminate redundant refcounting from _BINARY_OP_SUBSCR_LIST_INT (GH-142926)
LloydZ committed
33d94ab