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Tim Peters 3df0c4da4c Note out-of-date obmalloc comments (#148149) 
Vladimir's original overviews, from 1998, are still good, but going
on 30 years later details have changed. Note that, but rather try
to keep up with moving targets in a different file, point to
sys._debugmallocstats() as the sure way to discover precise current
details.

No code changes, just added a block comment.

Co-authored-by: Bartosz Sławecki <bartosz@ilikepython.com>
2026-04-06 23:08:47 -05:00
..
mimalloc
gh-144490: Fix mimalloc debug build for C++ (#144620)
2026-02-10 11:56:52 +01:00
pycore_abstract.h
gh-135763: AC: Implement `allow_negative for Py_ssize_t` (#138150)
2025-09-01 22:55:22 +01:00
pycore_asdl.h
…
pycore_ast_state.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_ast.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_atexit.h
…
pycore_audit.h
…
pycore_backoff.h
gh-127958: Trace from RESUME in the JIT (GH-145905)
2026-03-17 00:18:59 +08:00
pycore_bitutils.h
…
pycore_blocks_output_buffer.h
gh-139877: Use PyBytesWriter in pycore_blocks_output_buffer.h (#139976)
2025-10-14 10:03:55 -07:00
pycore_brc.h
…
pycore_bytes_methods.h
gh-71679: Share the repr implementation between bytes and bytearray (GH-138181)
2025-09-17 11:10:29 +03:00
pycore_bytesobject.h
gh-139871: Add bytearray.take_bytes([n]) to efficiently extract bytes (GH-140128)
2025-11-13 13:19:44 +00:00
pycore_c_array.h
…
pycore_call.h
gh-145779: Improve classmethod/staticmethod scaling in free-threaded build (#145826)
2026-03-17 14:24:44 -04:00
pycore_capsule.h
…
pycore_cell.h
gh-144490: Fix C++ compatibility in pycore_cell.h (GH-144482)
2026-02-06 22:11:58 -05:00
pycore_ceval_state.h
…
pycore_ceval.h
gh-131798: JIT inline function addresses of builtin methods (#146906)
2026-04-04 09:12:13 +05:30
pycore_code.h
gh-100239: Propagate type info through _BINARY_OP_EXTEND in tier 2 (GH-148146)
2026-04-06 20:52:42 +08:00
pycore_codecs.h
…
pycore_compile.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_complexobject.h
…
pycore_condvar.h
…
pycore_context.h
gh-140414: streamline thread state access in asyncio (#142742)
2025-12-15 16:57:51 +05:30
pycore_critical_section.h
gh-144969: Document that the free threading GC can change ob_tid (#144972)
2026-02-19 01:49:09 +01:00
pycore_crossinterp_data_registry.h
gh-132775: Support Fallbacks in _PyObject_GetXIData() (gh-133482)
2025-05-21 07:23:48 -06:00
pycore_crossinterp.h
gh-148072: Cache pickle.dumps/loads per interpreter in XIData (GH-148125)
2026-04-06 11:37:02 -04:00
pycore_debug_offsets.h
GH-146527: Add more data to GC statistics and add it to PyDebugOffsets (#146532)
2026-03-28 18:52:10 +00:00
pycore_descrobject.h
gh-41779: Allow defining any __slots__ for a class derived from tuple (GH-141763)
2026-01-06 11:36:00 +02:00
pycore_dict_state.h
…
pycore_dict.h
gh-146558: JIT optimize dict access for objects with known hash (#146559)
2026-03-30 14:23:29 +00:00
pycore_dtoa.h
…
pycore_emscripten_signal.h
…
pycore_emscripten_trampoline.h
gh-145037: Fix Emscripten trampoline with emcc >= 4.0.19 (#145038)
2026-02-26 06:21:05 +08:00
pycore_exceptions.h
…
pycore_faulthandler.h
…
pycore_fileutils_windows.h
…
pycore_fileutils.h
…
pycore_floatobject.h
gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634)
2026-03-11 12:39:24 +01:00
pycore_flowgraph.h
GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569)
2026-01-16 09:11:58 +00:00
pycore_format.h
…
pycore_frame.h
gh-120321: Add gi_state, cr_state, and ag_state attributes (gh-144409)
2026-02-03 13:06:32 -05:00
pycore_freelist_state.h
gh-129813, PEP 782: Add PyBytesWriter C API (#138822)
2025-09-12 13:41:59 +02:00
pycore_freelist.h
gh-140544: store pointer to interpreter state as a thread local for fast access (#140573)
2025-10-25 19:56:07 +05:30
pycore_function.h
gh-145779: Improve classmethod/staticmethod scaling in free-threaded build (#145826)
2026-03-17 14:24:44 -04:00
pycore_gc.h
GH-139951: Fix major GC performance regression (GH-140262)
2025-10-21 15:22:15 +01:00
pycore_genobject.h
gh-120321: Make gen.gi_frame.clear() thread-safe (gh-143112)
2026-01-08 14:45:54 -05:00
pycore_getopt.h
…
pycore_gil.h
…
pycore_global_objects_fini_generated.h
gh-73613: Support Base32 and Base64 without padding (GH-147974)
2026-04-04 21:26:16 +03:00
pycore_global_objects.h
…
pycore_global_strings.h
gh-73613: Support Base32 and Base64 without padding (GH-147974)
2026-04-04 21:26:16 +03:00
pycore_hamt.h
…
pycore_hashtable.h
…
pycore_import.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_importdl.h
gh-141169: Re-raise exception from findfuncptr (GH-141349)
2025-11-11 13:52:13 +01:00
pycore_index_pool.h
…
pycore_initconfig.h
gh-116749: Fix code comment for _PyConfig_GIL_DEFAULT (gh-141804)
2025-11-24 10:42:00 -05:00
pycore_instruction_sequence.h
GH-143493: Conform to spec for generator expressions while supporting virtual iterators (GH-143569)
2026-01-16 09:11:58 +00:00
pycore_instruments.h
gh-142913: Add test case for interpreter generator w/ overridden opcodes (#142911)
2026-01-16 10:33:29 -08:00
pycore_interp_structs.h
gh-146527: Heap-allocate gc_stats to avoid bloating PyInterpreterState (#148057)
2026-04-04 18:42:30 +01:00
pycore_interp.h
…
pycore_interpframe_structs.h
GH-140643: Add <native> and <GC> frames to the sampling profiler (#141108)
2025-11-17 13:39:00 +00:00
pycore_interpframe.h
gh-148144: Initialize visited on copied interpreter frames (#148143)
2026-04-06 00:23:07 +01:00
pycore_interpolation.h
gh-132661: Implement PEP 750 (#132662)
2025-04-30 11:46:41 +02:00
pycore_intrinsics.h
…
pycore_jit.h
GH-126910: add test for manual frame unwinding (#144137)
2026-01-27 13:17:40 +00:00
pycore_lazyimportobject.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_list.h
gh-144569: Avoid creating temporary objects in BINARY_SLICE for list, tuple, and unicode (GH-144590)
2026-03-02 17:02:38 +00:00
pycore_llist.h
…
pycore_lock.h
gh-120321: Make gi_yieldfrom thread-safe in free-threading build (#144292)
2026-01-30 12:20:27 -05:00
pycore_long.h
gh-143050: Add helper _PyLong_InitTag() (#147956)
2026-04-01 21:42:10 +00:00
pycore_magic_number.h
GH-145667: Merge GET_ITER and GET_YIELD_FROM_ITER (GH-146120)
2026-03-21 10:48:13 +00:00
pycore_memoryobject.h
…
pycore_mimalloc.h
…
pycore_mmap.h
gh-142419: Add mmap.set_name method for user custom annotation (gh-142480)
2025-12-18 23:33:49 +09:00
pycore_modsupport.h
gh-129594: Remove redundant check on varargs in _PyArg_CheckPositional (#129595)
2025-05-26 10:51:12 +02:00
pycore_moduleobject.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_namespace.h
…
pycore_object_alloc.h
…
pycore_object_deferred.h
…
pycore_object_stack.h
…
pycore_object_state.h
…
pycore_object.h
gh-146175: Soft-deprecate outdated macros; convert internal usage (GH-146178)
2026-03-23 12:42:09 +01:00
pycore_obmalloc_init.h
…
pycore_obmalloc.h
Note out-of-date obmalloc comments (#148149)
2026-04-06 23:08:47 -05:00
pycore_opcode_metadata.h
gh-131798: split recursion check to _CHECK_RECURSION_LIMIT and combine checks (GH-148070)
2026-04-04 17:23:03 +08:00
pycore_opcode_utils.h
GH-145667: Merge GET_ITER and GET_YIELD_FROM_ITER (GH-146120)
2026-03-21 10:48:13 +00:00
pycore_optimizer_types.h
gh-131798: split recursion check to _CHECK_RECURSION_LIMIT and combine checks (GH-148070)
2026-04-04 17:23:03 +08:00
pycore_optimizer.h
gh-148083: Prevent constant folding when lhs is container types (gh-148090)
2026-04-05 00:40:12 +09:00
pycore_parking_lot.h
…
pycore_parser.h
gh-122581: Use parser mutex in default build for subinterpreters (gh-142959)
2025-12-20 15:37:31 -05:00
pycore_pathconfig.h
…
pycore_pyarena.h
…
pycore_pyatomic_ft_wrappers.h
gh-145685: Improve scaling of type attribute lookups (gh-145774)
2026-03-12 13:30:36 -04:00
pycore_pybuffer.h
…
pycore_pyerrors.h
gh-142913: Add test case for interpreter generator w/ overridden opcodes (#142911)
2026-01-16 10:33:29 -08:00
pycore_pyhash.h
…
pycore_pylifecycle.h
gh-136421: Load _datetime static types during interpreter initialization (GH-136583)
2025-07-21 13:47:26 -04:00
pycore_pymath.h
gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634)
2026-03-11 12:39:24 +01:00
pycore_pymem_init.h
gh-144914: use mimalloc for raw allocations on free-threading (#144916)
2026-02-18 04:16:27 +00:00
pycore_pymem.h
gh-116008: Detect freed thread state in faulthandler (#141988)
2025-11-27 12:35:00 +01:00
pycore_pystate.h
GH-126910: Revert "Make _Py_get_machine_stack_pointer return the stack pointer (#147945)" (GH-147994)
2026-04-02 16:53:09 +02:00
pycore_pystats.h
gh-131253: free-threaded build support for pystats (gh-137189)
2025-11-03 11:36:37 -08:00
pycore_pythonrun.h
GH-126910: Revert "Make _Py_get_machine_stack_pointer return the stack pointer (#147945)" (GH-147994)
2026-04-02 16:53:09 +02:00
pycore_pythread.h
…
pycore_qsbr.h
gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554)
2026-02-17 11:12:25 -05:00
pycore_range.h
…
pycore_runtime_init_generated.h
gh-73613: Support Base32 and Base64 without padding (GH-147974)
2026-04-04 21:26:16 +03:00
pycore_runtime_init.h
gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634)
2026-03-11 12:39:24 +01:00
pycore_runtime_structs.h
gh-145633: Remove support for ancient ARM platforms with mixed-endian doubles (#145634)
2026-03-11 12:39:24 +01:00
pycore_runtime.h
…
pycore_semaphore.h
gh-137433: Fix deadlock with stop-the-world and daemon threads (gh-137735)
2025-09-16 09:21:58 +01:00
pycore_setobject.h
…
pycore_signal.h
…
pycore_sliceobject.h
…
pycore_stackref.h
gh-145685: Avoid contention on TYPE_LOCK in super() lookups (gh-145775)
2026-03-11 07:19:32 -04:00
pycore_stats.h
gh-131253: free-threaded build support for pystats (gh-137189)
2025-11-03 11:36:37 -08:00
pycore_strhex.h
gh-147944: Increase range of bytes_per_sep (GH-147946)
2026-04-01 08:33:30 +00:00
pycore_structs.h
…
pycore_structseq.h
…
pycore_symtable.h
gh-142349: Implement PEP 810 - Explicit lazy imports (#142351)
2026-02-12 00:15:33 +00:00
pycore_sysmodule.h
gh-108512: Add and use new replacements for PySys_GetObject() (GH-111035)
2025-05-28 20:11:09 +03:00
pycore_template.h
gh-132661: Implement PEP 750 (#132662)
2025-04-30 11:46:41 +02:00
pycore_time.h
Remove internal _PyTime_AsLong() function (#141053)
2025-11-05 18:37:06 +01:00
pycore_token.h
gh-132661: Implement PEP 750 (#132662)
2025-04-30 11:46:41 +02:00
pycore_traceback.h
gh-125434: Display thread name in faulthandler on Windows (#140675)
2025-10-27 18:41:18 +01:00
pycore_tracemalloc.h
gh-143057: avoid locking in tracemalloc C-APIs when it is not enabled (#143065)
2025-12-22 21:08:07 +05:30
pycore_tstate.h
gh-144438: Fix false sharing between QSBR and tlbc_index (gh-144554)
2026-02-17 11:12:25 -05:00
pycore_tuple.h
gh-143414: Implement unique reference tracking for JIT, optimize unpacking of such tuples (GH-144300)
2026-03-23 00:57:23 +08:00
pycore_typedefs.h
…
pycore_typeobject.h
gh-145500: Delete _PyType_GetMRO (gh-145501)
2026-03-04 13:32:43 -05:00
pycore_typevarobject.h
…
pycore_ucnhash.h
…
pycore_unicodectype.h
gh-129117: Add unicodedata.isxidstart() function (#140269)
2025-10-30 10:18:12 +00:00
pycore_unicodeobject_generated.h
gh-73613: Support Base32 and Base64 without padding (GH-147974)
2026-04-04 21:26:16 +03:00
pycore_unicodeobject.h
gh-103997: Remove incorrect statements about -c dedenting (gh-138624)
2026-03-10 09:56:00 +01:00
pycore_unionobject.h
…
pycore_uniqueid.h
…
pycore_uop_ids.h
gh-131798: split recursion check to _CHECK_RECURSION_LIMIT and combine checks (GH-148070)
2026-04-04 17:23:03 +08:00
pycore_uop_metadata.h
gh-131798: split recursion check to _CHECK_RECURSION_LIMIT and combine checks (GH-148070)
2026-04-04 17:23:03 +08:00
pycore_uop.h
gh-144888: JIT executor bloom filter wide-type optimization and function Inlining (GH-146114)
2026-03-19 00:58:14 +08:00
pycore_warnings.h
…
pycore_weakref.h
gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614)
2025-06-30 11:14:31 +00:00