cpython

mirror of https://github.com/python/cpython.git synced 2026-05-06 12:49:07 -04:00

Files

T

zSirius 5d416324c5 gh-146455: Fix O(N²) in add_const() after constant folding moved to CFG (#146456 )

The add_const() function in flowgraph.c uses a linear search over the
consts list to find the index of a constant. After gh-126835 moved
constant folding from the AST optimizer to the CFG optimizer, this
function is now called N times for N inner tuple elements during
fold_tuple_of_constants(), resulting in O(N²) total time.

Fix by maintaining an auxiliary _Py_hashtable_t that maps object
pointers to their indices in the consts list, providing O(1) lookup.

For a file with 100,000 constant 2-tuples:
- Before: 10.38s (add_const occupies 83.76% of CPU time)
- After:  1.48s

2026-04-26 15:15:24 +03:00

clinic

Improve hash() builtin docstring with caveats. (GH-125229)

2026-04-24 16:36:46 +00:00

frozen_modules

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_contextvars.c

gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770 )

2026-03-24 17:47:55 +00:00

_warnings.c

gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770 )

2026-03-24 17:47:55 +00:00

asdl.c

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asm_trampoline.S

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assemble.c

gh-146442: Fix various bugs in compiler pipeline (#146443 )

2026-03-30 22:04:04 +02:00

ast_preprocess.c

gh-143055: Implementation of PEP 798 (#143056 )

2026-01-30 20:37:52 -08:00

ast_unparse.c

gh-143055: Fix crash in AST unparser when unparsing dict comprehension unpacking (#145556 )

2026-03-09 10:37:23 -07:00

ast.c

gh-143055: Implementation of PEP 798 (#143056 )

2026-01-30 20:37:52 -08:00

bltinmodule.c

Improve hash() builtin docstring with caveats. (GH-125229)

2026-04-24 16:36:46 +00:00

bootstrap_hash.c

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brc.c

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bytecodes.c

gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)

2026-04-24 10:37:01 +01:00

ceval_gil.c

gh-144748: Make PyErr_CheckSignals raise the exception scheduled by PyThreadState_SetAsyncExc (GH-145178)

2026-03-02 11:47:32 +01:00

ceval_macros.h

gh-146031: Allow keeping specialization enabled when specifying eval frame function (#146032 )

2026-04-16 09:44:26 -07:00

ceval.c

GH-126910: Build/link the JIT shim in the Python interpreter (#148872 )

2026-04-23 12:23:18 +01:00

ceval.h

gh-142186: Allow all PEP-669 events to be per-code object and disableable (GH-146182)

2026-04-22 09:08:23 +01:00

codecs.c

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codegen.c

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)

2026-04-16 15:22:22 +01:00

compile.c

gh-148973: fix segfault on mismatch between consts size and oparg in compiler (#148974 )

2026-04-25 10:47:41 +01:00

condvar.h

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config_common.h

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context.c

gh-116738: make entering of contextvars.Context thread safe (#143074 )

2026-01-06 12:24:02 +05:30

critical_section.c

gh-144513: Skip critical section locking during stop-the-world (gh-144524)

2026-02-06 15:14:08 +00:00

crossinterp_data_lookup.h

gh-147960: Fix memory leak in crossinterp _tuple_shared() on alloc failure (#147961 )

2026-04-01 18:34:55 +02:00

crossinterp_exceptions.h

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crossinterp.c

gh-148072: Cache pickle.dumps/loads per interpreter in XIData (GH-148125)

2026-04-06 11:37:02 -04:00

dtoa.c

gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634 )

2026-03-11 12:39:24 +01:00

dup2.c

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dynamic_annotations.c

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dynload_hpux.c

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dynload_shlib.c

gh-146636: PEP 803: add Py_TARGET_ABI3T and .abi3t.so extension (GH-146637)

2026-04-01 16:14:59 +02:00

dynload_stub.c

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dynload_win.c

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emscripten_signal.c

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emscripten_syscalls.c

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emscripten_trampoline_inner.c

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emscripten_trampoline.c

gh-145037: Fix Emscripten trampoline with emcc >= 4.0.19 (#145038 )

2026-02-26 06:21:05 +08:00

errors.c

gh-146480: Override the exception in _PyErr_SetKeyError() (#146486 )

2026-03-27 11:20:19 +00:00

executor_cases.c.h

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)

2026-04-16 15:22:22 +01:00

fileutils.c

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flowgraph.c

gh-146455: Fix O(N²) in add_const() after constant folding moved to CFG (#146456 )

2026-04-26 15:15:24 +03:00

frame.c

gh-144446: Fix some frame object thread-safety issues (gh-144479)

2026-02-06 09:43:36 -05:00

frozen.c

GH-145278: freeze encodings (partially) and linecache (#148347 )

2026-04-14 21:01:23 +01:00

frozenmain.c

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future.c

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gc_free_threading.c

gh-146527: Heap-allocate gc_stats to avoid bloating PyInterpreterState (#148057 )

2026-04-04 18:42:30 +01:00

gc_gil.c

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gc.c

gh-146527: Heap-allocate gc_stats to avoid bloating PyInterpreterState (#148057 )

2026-04-04 18:42:30 +01:00

generated_cases.c.h

gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)

2026-04-24 10:37:01 +01:00

getargs.c

gh-146615: Fix format specifiers in Python/ directory (GH-146619)

2026-03-31 10:59:17 +03:00

getcompiler.c

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getcopyright.c

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getopt.c

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getplatform.c

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getversion.c

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hamt.c

GH-145247: Use _PyTuple_FromPair in Parser and Python (#145842 )

2026-03-11 21:08:18 +00:00

hashtable.c

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import.c

gh-148110: Resolve lazy import filter names for relative imports (#148111 )

2026-04-06 22:29:02 +01:00

importdl.c

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index_pool.c

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initconfig.c

gh-146244: Fix initconfig.c SET_ITEM macro leaks dict on expression failure (GH-146246)

2026-03-25 19:09:56 +00:00

instruction_sequence.c

GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569)

2026-01-16 09:11:58 +00:00

instrumentation.c

gh-142186: Allow all PEP-669 events to be per-code object and disableable (GH-146182)

2026-04-22 09:08:23 +01:00

interpconfig.c

gh-146615: Fix format specifiers in Python/ directory (GH-146619)

2026-03-31 10:59:17 +03:00

intrinsics.c

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jit.c

GH-126910: Build/link the JIT shim in the Python interpreter (#148872 )

2026-04-23 12:23:18 +01:00

legacy_tracing.c

gh-148037: remove critical section from PyCode_Addr2Line (#148103 )

2026-04-10 17:58:17 +05:30

lock.c

gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852)

2026-04-22 14:31:19 -04:00

marshal.c

gh-148653: Fix some marshal errors related to recursive immutable objects (GH-148698)

2026-04-18 11:24:33 +03:00

modsupport.c

gh-146636: Py_mod_abi mandatory for modules created from slots array (GH-146855)

2026-04-02 13:54:21 +02:00

mysnprintf.c

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mystrtoul.c

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object_stack.c

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opcode_targets.h

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)

2026-04-16 15:22:22 +01:00

optimizer_analysis.c

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

2026-04-14 22:44:39 +08:00

optimizer_bytecodes.c

gh-146393: Remove special character in optimizer_bytecodes.c (#148693 )

2026-04-17 16:52:16 +00:00

optimizer_cases.c.h

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)

2026-04-16 15:22:22 +01:00

optimizer_symbols.c

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

2026-04-13 02:23:47 +08:00

optimizer.c

gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)

2026-04-24 10:37:01 +01:00

parking_lot.c

gh-148820: Fix _PyRawMutex use-after-free on spurious semaphore wakeup (gh-148852)

2026-04-22 14:31:19 -04:00

pathconfig.c

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perf_jit_trampoline.c

gh-144194: Fix mmap failure check in perf_jit_trampoline.c (#143713 )

2026-01-28 13:30:17 +00:00

perf_trampoline.c

gh-144766: Fix a crash in fork child process when perf support is enabled. (#144795 )

2026-02-14 11:41:28 +00:00

preconfig.c

gh-146302: make Py_IsInitialized() thread-safe and reflect true init completion (GH-146303)

2026-04-11 21:54:23 +00:00

pyarena.c

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pyctype.c

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pyfpe.c

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pyhash.c

gh-141226: Deprecate PEP-456 support for embedders (#141287 )

2026-02-21 12:42:13 +01:00

pylifecycle.c

GH-126910: Build/link the JIT shim in the Python interpreter (#148872 )

2026-04-23 12:23:18 +01:00

pymath.c

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pystate.c

gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)

2026-04-24 10:37:01 +01:00

pystats.c

gh-146073: Add fitness/exit quality mechanism for JIT trace frontend (GH-148089)

2026-04-24 10:37:01 +01:00

pystrcmp.c

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pystrhex.c

gh-148474: Fix _Py_hexlify_simd compilation with older clang (#148475 )

2026-04-16 11:21:23 +05:30

pystrtod.c

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Python-ast.c

gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770 )

2026-03-24 17:47:55 +00:00

Python-tokenize.c

gh-128341: Use _Py_ABI_SLOT in stdlib modules (#145770 )

2026-03-24 17:47:55 +00:00

pythonrun.c

gh-146615: Fix format specifiers in Python/ directory (GH-146619)

2026-03-31 10:59:17 +03:00

pytime.c

gh-145731: Fix negative timestamp during DST on Windows (GH-145728)

2026-03-10 09:45:07 +01:00

qsbr.c

gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554)

2026-02-17 11:12:25 -05:00

README

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record_functions.c.h

GH-145668: Add FOR_ITER specialization for virtual iterators. Specialize GET_ITER. (GH-147967)

2026-04-16 15:22:22 +01:00

remote_debug.h

gh-144316: Fix missing exception in _remote_debugging with debug=False (#144442 )

2026-02-26 21:14:34 +00:00

remote_debugging.c

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specialize.c

gh-146031: Allow keeping specialization enabled when specifying eval frame function (#146032 )

2026-04-16 09:44:26 -07:00

stackrefs.c

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stdlib_module_names.h

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structmember.c

gh-41779: Allow defining any __slots__ for a class derived from tuple (GH-141763)

2026-01-06 11:36:00 +02:00

suggestions.c

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symtable.c

gh-137814: Fix __qualname__ of __annotate__ (#137842 )

2026-04-15 21:52:30 -07:00

sysmodule.c

gh-146302: make Py_IsInitialized() thread-safe and reflect true init completion (GH-146303)

2026-04-11 21:54:23 +00:00

thread_nt.h

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thread_pthread_stubs.h

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thread_pthread.h

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thread.c

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tier2_engine.md

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traceback.c

gh-145792: Fix incorrect alloca allocation size in traceback.c (#145814 )

2026-03-13 13:15:26 +01:00

tracemalloc.c

gh-144763: Don't detach the GIL in tracemalloc (#144779 )

2026-02-18 15:57:48 +00:00

uniqueid.c

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vm-state.md

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README

Miscellaneous source files for the main Python shared library