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* bpo-45530: speed listobject.c's unsafe_tuple_compare() (GH-29076)Tim Peters2021-10-251-13/+64
| | | | | | | | Keep track of whether unsafe_tuple_compare() calls are resolved by the very first tuple elements, and adjust strategy accordingly. This can significantly cut the number of calls made to the full-blown PyObject_RichCompareBool(), and especially when duplicates are rare. Co-authored-by: Łukasz Langa <lukasz@langa.pl>
* bpo-45522: Allow to disable freelists on build time (GH-29056)Christian Heimes2021-10-211-6/+18
| | | | | | | | Freelists for object structs can now be disabled. A new ``configure`` option ``--without-freelists`` can be used to disable all freelists except empty tuple singleton. Internal Py*_MAXFREELIST macros can now be defined as 0 without causing compiler warnings and segfaults. Signed-off-by: Christian Heimes <christian@python.org>
* Fix typos in the Objects directory (GH-28766)Christian Clauss2021-10-061-2/+2
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* Clean up initialization __class_getitem__ with Py_GenericAlias. (GH-28450)Serhiy Storchaka2021-09-191-1/+1
| | | | | The cast to PyCFunction is redundant. Overuse of redundant casts can hide actual bugs.
* bpo-34561: Switch to Munro & Wild "powersort" merge strategy. (#28108)Tim Peters2021-09-061-33/+79
| | | | | For list.sort(), replace our ad hoc merge ordering strategy with the principled, elegant, and provably near-optimal one from Munro and Wild's "powersort".
* bpo-44707: Fix an undefined behavior of the null pointer arithmetic (GH-27292)Serhiy Storchaka2021-07-291-2/+9
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* bpo-43977: Use tp_flags for collection matching (GH-25723)Mark Shannon2021-04-301-1/+1
| | | | | | | | | | | | | * Add Py_TPFLAGS_SEQUENCE and Py_TPFLAGS_MAPPING, add to all relevant standard builtin classes. * Set relevant flags on collections.abc.Sequence and Mapping. * Use flags in MATCH_SEQUENCE and MATCH_MAPPING opcodes. * Inherit Py_TPFLAGS_SEQUENCE and Py_TPFLAGS_MAPPING. * Add NEWS * Remove interpreter-state map_abc and seq_abc fields.
* bpo-42128: Structural Pattern Matching (PEP 634) (GH-22917)Brandt Bucher2021-02-261-1/+2
| | | | | Co-authored-by: Guido van Rossum <guido@python.org> Co-authored-by: Talin <viridia@gmail.com> Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
* bpo-43268: Pass interp rather than tstate to internal functions (GH-24580)Victor Stinner2021-02-191-5/+5
| | | | | | | | | | | | | | | Pass the current interpreter (interp) rather than the current Python thread state (tstate) to internal functions which only use the interpreter. Modified functions: * _PyXXX_Fini() and _PyXXX_ClearFreeList() functions * _PyEval_SignalAsyncExc(), make_pending_calls() * _PySys_GetObject(), sys_set_object(), sys_set_object_id(), sys_set_object_str() * should_audit(), set_flags_from_config(), make_flags() * _PyAtExit_Call() * init_stdio_encoding() * etc.
* bpo-42519: Replace PyMem_MALLOC() with PyMem_Malloc() (GH-23586)Victor Stinner2020-12-011-12/+12
| | | | | | | | | | | No longer use deprecated aliases to functions: * Replace PyMem_MALLOC() with PyMem_Malloc() * Replace PyMem_REALLOC() with PyMem_Realloc() * Replace PyMem_FREE() with PyMem_Free() * Replace PyMem_Del() with PyMem_Free() * Replace PyMem_DEL() with PyMem_Free() Modify also the PyMem_DEL() macro to use directly PyMem_Free().
* Fix typo in Object/listobject.c (GH-21079)Jeong Ukjae2020-06-291-1/+1
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* bpo-40521: Cleanup code of free lists (GH-21082)Victor Stinner2020-06-231-6/+12
| | | Add get_xxx_state() function to factorize duplicated code.
* bpo-41078: Rename pycore_tupleobject.h to pycore_tuple.h (GH-21056)Victor Stinner2020-06-221-4/+4
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* bpo-40887: Don't use finalized free lists (GH-20700)Victor Stinner2020-06-081-0/+12
| | | | | | In debug mode, ensure that free lists are no longer used after being finalized. Set numfree to -1 in finalization functions (eg. _PyList_Fini()), and then check that numfree is not equal to -1 before using a free list (e.g list_dealloc()).
* bpo-40521: Make list free list per-interpreter (GH-20642)Victor Stinner2020-06-051-31/+29
| | | | | | | | | | | | Each interpreter now has its own list free list: * Move list numfree and free_list into PyInterpreterState. * Add _Py_list_state structure. * Add tstate parameter to _PyList_ClearFreeList() and _PyList_Fini(). * Remove "#ifdef EXPERIMENTAL_ISOLATED_SUBINTERPRETERS". * _PyGC_Fini() clears gcstate->garbage list which can be stored in the list free list. Call _PyGC_Fini() before _PyList_Fini() to prevent leaking this list.
* bpo-34397: Remove redundant overflow checks in list and tuple ↵Sergey Fedoseev2020-05-251-13/+3
| | | | implementation. (GH-8757)
* bpo-40521: Disable list free list in subinterpreters (GH-19959)Victor Stinner2020-05-061-1/+8
| | | | | | When Python is built with experimental isolated interpreters, disable the list free list. Temporary workaround until this cache is made per-interpreter.
* bpo-40428: Remove PyTuple_ClearFreeList() function (GH-19769)Victor Stinner2020-04-291-7/+4
| | | | | | | | | | | | | | | | | | | Remove the following function from the C API: * PyAsyncGen_ClearFreeLists() * PyContext_ClearFreeList() * PyDict_ClearFreeList() * PyFloat_ClearFreeList() * PyFrame_ClearFreeList() * PyList_ClearFreeList() * PySet_ClearFreeList() * PyTuple_ClearFreeList() Make these functions private, move them to the internal C API and change their return type to void. Call explicitly PyGC_Collect() to free all free lists. Note: PySet_ClearFreeList() did nothing.
* bpo-40268: Remove a few pycore_pystate.h includes (GH-19510)Victor Stinner2020-04-141-1/+0
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* bpo-40170: Add _PyIndex_Check() internal function (GH-19426)Victor Stinner2020-04-081-2/+3
| | | | | | | | | Add _PyIndex_Check() function to the internal C API: fast inlined verson of PyIndex_Check(). Add Include/internal/pycore_abstract.h header file. Replace PyIndex_Check() with _PyIndex_Check() in C files of Objects and Python subdirectories.
* bpo-39481: Implementation for PEP 585 (#18239)Guido van Rossum2020-04-071-0/+1
| | | | | | | | | | | | This implements things like `list[int]`, which returns an object of type `types.GenericAlias`. This object mostly acts as a proxy for `list`, but has attributes `__origin__` and `__args__` that allow recovering the parts (with values `list` and `(int,)`. There is also an approximate notion of type variables; e.g. `list[T]` has a `__parameters__` attribute equal to `(T,)`. Type variables are objects of type `typing.TypeVar`.
* bpo-37207: Use vectorcall for list() (GH-18928)Petr Viktorin2020-03-301-0/+28
| | | | | | | Speed up calls to list() by using the PEP 590 vectorcall calling convention. Patch by Mark Shannon. Co-authored-by: Mark Shannon <mark@hotpy.org> Co-authored-by: Dong-hee Na <donghee.na92@gmail.com>
* bpo-38373: Change list overallocating strategy. (GH-18952)Serhiy Storchaka2020-03-171-6/+8
| | | | | * Add padding to make the allocated size multiple of 4. * Do not overallocate if the new size is closer to overalocated size than to the old size.
* bpo-39573: Finish converting to new Py_IS_TYPE() macro (GH-18601)Andy Lester2020-03-041-11/+11
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* bpo-39737: Remove code repitition in list_richcompare (GH-18638)sweeneyde2020-02-261-2/+1
| | | I may speed up list comparison on some platforms.
* bpo-39245: Switch to public API for Vectorcall (GH-18460)Petr Viktorin2020-02-111-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The bulk of this patch was generated automatically with: for name in \ PyObject_Vectorcall \ Py_TPFLAGS_HAVE_VECTORCALL \ PyObject_VectorcallMethod \ PyVectorcall_Function \ PyObject_CallOneArg \ PyObject_CallMethodNoArgs \ PyObject_CallMethodOneArg \ ; do echo $name git grep -lwz _$name | xargs -0 sed -i "s/\b_$name\b/$name/g" done old=_PyObject_FastCallDict new=PyObject_VectorcallDict git grep -lwz $old | xargs -0 sed -i "s/\b$old\b/$new/g" and then cleaned up: - Revert changes to in docs & news - Revert changes to backcompat defines in headers - Nudge misaligned comments
* bpo-39573: Use Py_SET_SIZE() function (GH-18402)Victor Stinner2020-02-071-13/+13
| | | | Replace direct acccess to PyVarObject.ob_size with usage of the Py_SET_SIZE() function.
* bpo-39573: Use Py_TYPE() macro in Objects directory (GH-18392)Victor Stinner2020-02-071-19/+19
| | | Replace direct access to PyObject.ob_type with Py_TYPE().
* bpo-39489: Remove COUNT_ALLOCS special build (GH-18259)Victor Stinner2020-02-031-36/+0
| | | | | | | | | | | Remove: * COUNT_ALLOCS macro * sys.getcounts() function * SHOW_ALLOC_COUNT code in listobject.c * SHOW_TRACK_COUNT code in tupleobject.c * PyConfig.show_alloc_count field * -X showalloccount command line option * @test.support.requires_type_collecting decorator
* bpo-39453: Add testcase for bpo-39453 (GH-18202)Dong-hee Na2020-01-271-1/+1
| | | | | | | | | https://bugs.python.org/issue39453 Automerge-Triggered-By: @pablogsal Automerge-Triggered-By: @pablogsal
* bpo-39453: Make list.__contains__ hold strong references to avoid crashes ↵Dong-hee Na2020-01-271-1/+6
| | | | (GH-18181)
* bpo-39425: Fix list.count performance regression (GH-18119)Dong-hee Na2020-01-221-0/+4
| | | | | | | https://bugs.python.org/issue39425 Automerge-Triggered-By: @pablogsal
* bpo-38588: Optimize list comparison. (GH-17766)Inada Naoki2019-12-311-0/+3
| | | Mitigate performance regression of the list comparison caused by 2d5bf56.
* bpo-38588: Fix possible crashes in dict and list when calling ↵Dong-hee Na2019-12-311-0/+7
| | | | | | PyObject_RichCompareBool (GH-17734) Take strong references before calling PyObject_RichCompareBool to protect against the case where the object dies during the call.
* bpo-38610: Fix possible crashes in several list methods (GH-17022)Zackery Spytz2019-12-301-3/+12
| | | Hold strong references to list elements while calling PyObject_RichCompareBool().
* bpo-36946:Fix possible signed integer overflow when handling slices. (GH-15639)HongWeipeng2019-09-081-2/+4
| | | | This is a complement to PR 13375.
* Make PyXXX_Fini() functions private (GH-15531)Victor Stinner2019-08-261-1/+1
| | | | | For example, rename PyTuple_Fini() to _PyTuple_Fini(). These functions are only declared in the internal C API.
* bpo-37648: Fixed minor inconsistency in some __contains__. (GH-14904)Serhiy Storchaka2019-08-041-2/+1
| | | | | The collection's item is now always at the left and the needle is on the right of ==.
* bpo-37483: add _PyObject_CallOneArg() function (#14558)Jeroen Demeyer2019-07-041-2/+1
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* Improve docstring of list.sort (GH-8516)Tim Hoffmann2019-06-011-2/+10
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* bpo-36974: tp_print -> tp_vectorcall_offset and tp_reserved -> tp_as_async ↵Jeroen Demeyer2019-05-311-6/+6
| | | | | | | | | (GH-13464) Automatically replace tp_print -> tp_vectorcall_offset tp_compare -> tp_as_async tp_reserved -> tp_as_async
* bpo-36763: Implement the PEP 587 (GH-13592)Victor Stinner2019-05-271-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Add a whole new documentation page: "Python Initialization Configuration" * PyWideStringList_Append() return type is now PyStatus, instead of int * PyInterpreterState_New() now calls PyConfig_Clear() if PyConfig_InitPythonConfig() fails. * Rename files: * Python/coreconfig.c => Python/initconfig.c * Include/cpython/coreconfig.h => Include/cpython/initconfig.h * Include/internal/: pycore_coreconfig.h => pycore_initconfig.h * Rename structures * _PyCoreConfig => PyConfig * _PyPreConfig => PyPreConfig * _PyInitError => PyStatus * _PyWstrList => PyWideStringList * Rename PyConfig fields: * use_module_search_paths => module_search_paths_set * module_search_path_env => pythonpath_env * Rename PyStatus field: _func => func * PyInterpreterState: rename core_config field to config * Rename macros and functions: * _PyCoreConfig_SetArgv() => PyConfig_SetBytesArgv() * _PyCoreConfig_SetWideArgv() => PyConfig_SetArgv() * _PyCoreConfig_DecodeLocale() => PyConfig_SetBytesString() * _PyInitError_Failed() => PyStatus_Exception() * _Py_INIT_ERROR_TYPE_xxx enums => _PyStatus_TYPE_xxx * _Py_UnixMain() => Py_BytesMain() * _Py_ExitInitError() => Py_ExitStatusException() * _Py_PreInitializeFromArgs() => Py_PreInitializeFromBytesArgs() * _Py_PreInitializeFromWideArgs() => Py_PreInitializeFromArgs() * _Py_PreInitialize() => Py_PreInitialize() * _Py_RunMain() => Py_RunMain() * _Py_InitializeFromConfig() => Py_InitializeFromConfig() * _Py_INIT_XXX() => _PyStatus_XXX() * _Py_INIT_FAILED() => _PyStatus_EXCEPTION() * Rename 'err' PyStatus variables to 'status' * Convert RUN_CODE() macro to config_run_code() static inline function * Remove functions: * _Py_InitializeFromArgs() * _Py_InitializeFromWideArgs() * _PyInterpreterState_GetCoreConfig()
* bpo-35091: Objects/listobject.c: Replace overflow checks in gallop fu… ↵Alexey Izbyshev2019-05-231-8/+4
| | | | | | | | | | | | | | | | (GH-10202) …nctions with asserts The actual overflow can never happen because of the following: * The size of a list can't be greater than PY_SSIZE_T_MAX / sizeof(PyObject*). * The size of a pointer on all supported plaftorms is at least 4 bytes. * ofs is positive and less than the list size at the beginning of each iteration. https://bugs.python.org/issue35091
* bpo-35983: skip trashcan for subclasses (GH-11841)Jeroen Demeyer2019-05-101-2/+2
| | | | | Add new trashcan macros to deal with a double deallocation that could occur when the `tp_dealloc` of a subclass calls the `tp_dealloc` of a base class and that base class uses the trashcan mechanism. Patch by Jeroen Demeyer.
* bpo-36218: Fix handling of heterogeneous values in list.sort (GH-12209)Rémi Lapeyre2019-03-251-11/+22
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* bpo-36030: Add _PyTuple_FromArray() function (GH-11954)Sergey Fedoseev2019-02-251-16/+2
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* bpo-33989: Ensure that ms.key_compare is always initialized in ↵Zackery Spytz2019-02-211-0/+3
| | | | list_sort_impl(). (GH-8710)
* bpo-36062: Minor speed-up for list slicing and copying. (GH-11967)Sergey Fedoseev2019-02-211-8/+12
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* closes bpo-35623: Fix integer overflow when sorting large lists (GH-11380)sth2019-01-021-1/+0
| | | | | There is already a `Py_ssize_t i` defined at function scope that is used for similar loops. By removing the local `int i` declaration that `i` is used, which has the appropriate type.
* bpo-33234: Simplify list_preallocate_exact() (GH-11220)Sergey Fedoseev2018-12-291-14/+3
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