mirror/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2026-01-26 21:03:34 +00:00
Code Issues Packages Projects Releases Wiki Activity
cpython/Modules
History
Gregory P. Smith 61fc72a4a4
gh-124951: Optimize base64 encode & decode for an easy 2-3x speedup [no SIMD] (GH-143262) 
Optimize base64 encoding/decoding by eliminating loop-carried dependencies. Key changes:
- Add `base64_encode_trio()` and `base64_decode_quad()` helper functions that process complete groups independently
- Add `base64_encode_fast()` and `base64_decode_fast()` wrappers
- Update `b2a_base64` and `a2b_base64` to use fast path for complete groups

Performance gains (encode/decode speedup vs main, PGO builds):
```
             64 bytes    64K        1M
  Zen2:      1.2x/1.8x   1.7x/2.8x  1.5x/2.8x
  Zen4:      1.2x/1.7x   1.6x/3.0x  1.5x/3.0x  [old data, likely faster]
  M4:        1.3x/1.9x   2.3x/2.8x  2.4x/2.9x  [old data, likely faster]
  RPi5-32:   1.2x/1.2x   2.4x/2.4x  2.0x/2.1x
```

Based on my exploratory work done in https://github.com/python/cpython/compare/main...gpshead:cpython:claude/vectorize-base64-c-S7Hku

See PR and issue for further thoughts on sometimes MUCH faster SIMD vectorized versions of this.
2026-01-01 22:03:05 -08:00
..
_ctypes
gh-143164: Fix incorrect error message for ctypes bitfield overflow (GH-143165)
2025-12-25 19:08:43 +02:00
_decimal
gh-142595: Amend be5e0dcdedb (fix NULL pointer dereference) (GH-142775)
2025-12-16 10:52:20 +02:00
_hacl
gh-140120: Refresh HACL* to fix an hmac memory leak (GH-140188)
2025-10-16 05:25:51 +00:00
_io
gh-142594: fix by property calls io.TextIOWrapper.detach (GH-142706)
2025-12-15 15:13:58 +01:00
_multiprocessing
gh-138342: Move _PyObject_VisitType() to the internal C API (#139734)
2025-10-08 12:10:58 +02:00
_remote_debugging
gh-138122: fix AC warnings in Modules/_remote_debugging/module.c (#143218)
2025-12-27 12:57:03 +00:00
_sqlite
gh-142830: prevent some crashes when mutating sqlite3 callbacks (#143245)
2026-01-01 11:55:05 +01:00
_sre
gh-116738: Fix thread-safety issue in re module for free threading (gh-141923)
2025-11-26 15:40:45 -05:00
_ssl
gh-142438: Added missing GIL release in _PySSL_keylog_callback when keylog_bio is unset (gh-142439)
2025-12-11 23:30:39 +09:00
_testcapi
gh-142589: Fix PyUnstable_Object_IsUniqueReferencedTemporary (gh-142593)
2025-12-11 14:41:03 -05:00
_testinternalcapi
gh-114203: skip locking if object is already locked by two-mutex critical section (#141476)
2025-11-14 23:17:59 +05:30
_testlimitedcapi
gh-132657: add regression test for PySet_Contains with unhashable type (#141411)
2025-11-12 20:50:08 +05:30
_xxtestfuzz
gh-131253: free-threaded build support for pystats (gh-137189)
2025-11-03 11:36:37 -08:00
_zstd
gh-139877: Use PyBytesWriter in pycore_blocks_output_buffer.h (#139976)
2025-10-14 10:03:55 -07:00
cjkcodecs
gh-101828: Fix jisx0213 codecs removing null characters (gh-139340)
2025-10-14 22:55:00 +09:00
clinic
gh-135852: Remove out of tree pywin32 dependency for NTEventLogHandler (GH-137860)
2025-12-31 12:50:50 +02:00
expat
gh-139312: Update bundled libexpat to 2.7.3 (GH-139319)
2025-09-26 19:44:36 -07:00
_abc.c
GH-137623: Use an AC decorator for docstring line length enforcement (#137690)
2025-08-18 18:29:00 +01:00
_asynciomodule.c
gh-140414: streamline thread state access in asyncio (#142742)
2025-12-15 16:57:51 +05:30
_bisectmodule.c
GH-135763: AC: Use `Py_ssize_t(allow_negative=False)` (#138394)
2025-09-02 21:29:05 +01:00
_bz2module.c
gh-116738: Make _bz2 module thread-safe (gh-142756)
2025-12-15 12:47:04 -05:00
_codecsmodule.c
gh-55531: Implement normalize_encoding in C (#136643)
2025-10-30 15:31:47 +01:00
_collectionsmodule.c
gh-143004: Fix possible use-after-free in collections.Counter.update() (GH-143044)
2025-12-25 09:13:39 +00:00
_csv.c
gh-116738: Make csv module thread-safe (gh-141365)
2025-11-21 11:22:31 -05:00
_curses_panel.c
gh-116946: add Py_TPFLAGS_IMMUTABLETYPE to several internal types (#138582)
2025-09-11 09:56:20 +02:00
_cursesmodule.c
gh-129813, PEP 782: Use PyBytesWriter in _curses (#138920)
2025-09-15 16:24:34 +02:00
_datetimemodule.c
gh-139774: use relaxed atomics for datetime hashes (#139775)
2025-10-08 19:49:54 +05:30
_dbmmodule.c
gh-116738: Add critical section to dbm/gdbm context manager (gh-140391)
2025-10-22 11:16:28 -04:00
_elementtree.c
gh-143200: fix UAFs in Element.__{set,get}item__ when the element is concurrently mutated (#143226)
2025-12-29 18:30:51 +01:00
_functoolsmodule.c
GH-140590: Fix setstate for functools.partial C-module (GH-140671)
2025-10-28 10:28:32 +01:00
_gdbmmodule.c
gh-116738: Add critical section to dbm/gdbm context manager (gh-140391)
2025-10-22 11:16:28 -04:00
_hashopenssl.c
gh-142451: correctly copy HMAC attributes in HMAC.copy() (#142510)
2025-12-14 09:45:36 +01:00
_heapqmodule.c
Fix comments for heapq.siftup_max (#135359)
2025-07-03 15:21:41 +05:30
_interpchannelsmodule.c
gh-140306: Fix memory leaks in cross-interpreter data handling (GH-140307)
2025-10-19 22:24:28 +03:00
_interpqueuesmodule.c
gh-140306: Fix memory leaks in cross-interpreter data handling (GH-140307)
2025-10-19 22:24:28 +03:00
_interpreters_common.h
gh-132775: Use _PyObject_GetXIData (With Fallback) (gh-134440)
2025-05-22 06:50:06 -06:00
_interpretersmodule.c
GH-137623: Use an AC decorator for docstring line length enforcement (#137690)
2025-08-18 18:29:00 +01:00
_json.c
gh-137821: Improve Argument Clinic definitions in the `_json` module (#140780)
2025-10-30 10:32:08 +00:00
_localemodule.c
gh-130567: Remove optimistic allocation in locale.strxfrm() (GH-137143)
2025-10-16 09:54:41 +02:00
_lsprof.c
Remove internal _PyTime_AsLong() function (#141053)
2025-11-05 18:37:06 +01:00
_lzmamodule.c
gh-116738: use PyMutex in lzma module (#140711)
2025-11-12 02:01:55 +05:30
_math.h
…
_opcode.c
gh-135755: Move SPECIAL_ constants to a private header (GH-135922)
2025-06-25 13:03:05 +02:00
_operator.c
gh-131238: Add explicit includes to pycore headers (#131257)
2025-03-17 12:32:43 +01:00
_pickle.c
gh-115952: Fix a potential virtual memory allocation denial of service in pickle (GH-119204)
2025-12-05 19:17:01 +02:00
_posixsubprocess.c
gh-141659: Fix bad file descriptor error in subprocess on AIX (GH-141660)
2025-11-19 09:37:09 +02:00
_queuemodule.c
gh-135607: remove null checking of weakref list in dealloc of extension modules and objects (#135614)
2025-06-30 11:14:31 +00:00
_randommodule.c
Fix a compiler warning in _randommodule.c (#141058)
2025-11-05 18:00:32 +00:00
_scproxy.c
…
_ssl_data_35.h
gh-139573: Update OpenSSL in CI (GH-139577)
2025-10-04 19:43:17 -05:00
_ssl_data_111.h
gh-131423: Update OpenSSL data to 3.4.1 on Linux (#131618)
2025-04-25 10:26:58 +02:00
_ssl_data_300.h
…
_ssl_data_340.h
gh-131423: Update OpenSSL data to 3.4.1 on Linux (#131618)
2025-04-25 10:26:58 +02:00
_ssl.c
gh-140795: Keep 'err' in local variable in _ssl.c (gh-143275)
2025-12-30 19:45:44 -05:00
_ssl.h
…
_stat.c
gh-108765: fix comment about macro definitions in _stat.c post GH-108854 (#136027)
2025-06-27 15:15:11 +00:00
_statisticsmodule.c
…
_struct.c
gh-140260: fix data race in _struct module initialization with subinterpreters (#140909)
2025-11-13 16:31:31 +05:30
_suggestions.c
gh-116738: Make _suggestions module thread-safe (gh-140321)
2025-10-22 09:14:48 +09:00
_sysconfig.c
GH-137623: Use an AC decorator for docstring line length enforcement (#137690)
2025-08-18 18:29:00 +01:00
_testbuffer.c
gh-136300: Modify C tests to conform to PEP-737 (GH-136301)
2025-07-11 15:18:35 +02:00
_testcapi_feature_macros.inc
…
_testcapimodule.c
gh-142225: Add PyABIInfo_VAR to to _testcapimodule & _testinternalcapi (GH-142833)
2025-12-17 16:33:09 +01:00
_testclinic_limited.c
…
_testclinic.c
gh-111489: Remove _PyTuple_FromArray() alias (#139973)
2025-10-11 22:58:14 +02:00
_testimportmultiple.c
…
_testinternalcapi.c
gh-143183: Link trace to side exits, rather than stop (GH-143268)
2025-12-29 15:10:42 +00:00
_testlimitedcapi.c
gh-111495: Add PyFile tests (#129449)
2025-01-30 18:05:32 +01:00
_testmultiphase.c
gh-141780: Make PyModule_FromSlotsAndSpec enable GIL if needed (GH-141785)
2025-11-24 13:26:35 +01:00
_testsinglephase.c
gh-140550: Initial implementation of PEP 793 – PyModExport (GH-140556)
2025-11-05 12:31:42 +01:00
_threadmodule.c
GH-116946: revert eliminate the need for the GC in the _thread.lock and _thread.RLock (#141448)
2025-11-12 07:21:43 +00:00
_tkinter.c
gh-124111: Fix TCL 9 thread detection (GH-128103)
2025-11-12 22:16:58 +00:00
_tracemalloc.c
GH-137623: Use an AC decorator for docstring line length enforcement (#137690)
2025-08-18 18:29:00 +01:00
_typesmodule.c
gh-136492: Add FrameLocalsProxyType to types (GH-136546)
2025-07-20 20:49:00 +02:00
_typingmodule.c
gh-105499: Merge typing.Union and types.UnionType (#105511)
2025-03-04 11:44:19 -08:00
_uuidmodule.c
gh-132710: only use stable _uuid.generate_time_safe() to deduce MAC address (#132901)
2025-05-26 10:56:31 +02:00
_weakref.c
…
_winapi.c
gh-135852: Remove out of tree pywin32 dependency for NTEventLogHandler (GH-137860)
2025-12-31 12:50:50 +02:00
_zoneinfo.c
gh-142783: Fix possible use after free in zoneinfo module (GH-142790)
2025-12-17 08:35:08 +00:00
addrinfo.h
gh-114917: add support for AI_NUMERICSERV in getaddrinfo emulation (#114918)
2025-03-18 11:26:51 +01:00
arraymodule.c
gh-140474: Fix memory leak in array.array (GH-140478)
2025-10-23 05:49:27 -04:00
atexitmodule.c
gh-112127: Fix possible use-after-free in atexit.unregister() (GH-114092)
2025-12-17 17:09:57 +02:00
binascii.c
gh-124951: Optimize base64 encode & decode for an easy 2-3x speedup [no SIMD] (GH-143262)
2026-01-01 22:03:05 -08:00
blake2module.c
gh-138342: Move _PyObject_VisitType() to the internal C API (#139734)
2025-10-08 12:10:58 +02:00
cmathmodule.c
gh-116738: Statically initialize special constants in cmath module (gh-142161)
2025-12-04 09:21:51 -05:00
config.c.in
gh-128384: Use a context variable for warnings.catch_warnings (gh-130010)
2025-04-09 16:18:54 -07:00
errnomodule.c
…
faulthandler.c
gh-137725: Convert faulthandler to Argument Clinic (#137726)
2025-08-16 15:16:04 +02:00
fcntlmodule.c
gh-140615: Update docstrings in the fcntl module (GH-140619)
2025-11-08 12:17:59 +02:00
gc_weakref.txt
GH-135552: Make the GC clear weakrefs later (GH-136189)
2025-08-07 16:32:17 -07:00
gcmodule.c
GH-140638: Add a GC "candidates" stat (GH-141814)
2025-11-22 21:59:14 +00:00
getaddrinfo.c
gh-114917: Fix typo in getaddrinfo emulation (#131413)
2025-03-18 14:31:13 +01:00
getbuildinfo.c
gh-100388: Change undefined __DATE__ to the Unix epoch (#100389)
2025-03-03 14:59:46 +01:00
getnameinfo.c
Replace K&R function declarations with ANSI declarations (#114818)
2025-03-11 13:06:36 +01:00
getpath_noop.c
…
getpath.c
GH-131296: Avoid invalid signed char comparison in getpath.c assertion (GH-131594)
2025-04-22 14:06:30 +01:00
getpath.py
gh-120037: Disable user site packages when a ._pth file is used (GH-137428)
2025-08-19 21:28:28 +01:00
grpmodule.c
gh-116738: Make grp module thread-safe (#135434)
2025-07-14 11:18:41 -07:00
hashlib.h
gh-131876: Revert "gh-131876: extract _hashlib helpers into a separate directory (#136995) (#137307)
2025-08-01 10:45:40 -07:00
hmacmodule.c
gh-116946: remove unnecessary gc from immutable types (#139073)
2025-10-01 13:15:58 +05:30
itertoolsmodule.c
gh-140061: Use _PyObject_IsUniquelyReferenced() to check if objects are uniquely referenced (gh-140062)
2025-10-15 09:48:21 -04:00
ld_so_aix.in
…
main.c
gh-108512: Add and use new replacements for PySys_GetObject() (GH-111035)
2025-05-28 20:11:09 +03:00
makesetup
gh-116943: Ensure makesetup does not choke on missing EOL in Setup.* files (#139100)
2025-09-18 09:25:01 +00:00
makexp_aix
…
mathintegermodule.c
gh-81313: Add the math.integer module (PEP-791) (GH-133909)
2025-10-31 16:13:43 +02:00
mathmodule.c
gh-141004: soft-deprecate Py_INFINITY macro (#141033)
2025-11-12 13:44:49 +01:00
md5module.c
gh-138342: Move _PyObject_VisitType() to the internal C API (#139734)
2025-10-08 12:10:58 +02:00
mmapmodule.c
gh-63016: Add flags parameter on mmap.flush (#139553)
2025-12-27 10:33:56 +00:00
overlapped.c
GH-131296: Remove unused variable from overlapped.c (GH-131590)
2025-04-16 22:44:57 +01:00
posixmodule.c
gh-143012: use Py_ssize_t cast for PyBytes_FromStringAndSize (#143013)
2025-12-20 10:37:10 +03:00
posixmodule.h
…
pwdmodule.c
GH-137623: Use an AC decorator for docstring line length enforcement (#137690)
2025-08-18 18:29:00 +01:00
pyexpat.c
gh-140593: Fix a memory leak in function my_ElementDeclHandler of pyexpat (#140602)
2025-10-26 13:45:32 +00:00
readline.c
gh-122431: Correct the non-negative error message in readline.append_history_file (GH-143075)
2025-12-22 23:35:23 -05:00
README
…
resource.c
gh-137512: Add new constants in the resource module (GH-137513)
2025-08-19 08:52:45 +02:00
rotatingtree.c
…
rotatingtree.h
…
selectmodule.c
gh-67795: Accept any real numbers as timestamp and timeout (GH-139224)
2025-09-23 21:31:42 +03:00
Setup
gh-138122: Split Modules/_remote_debugging_module.c into multiple files (#141934)
2025-11-25 12:51:24 +00:00
Setup.bootstrap.in
gh-136421: Load _datetime static types during interpreter initialization (GH-136583)
2025-07-21 13:47:26 -04:00
Setup.stdlib.in
gh-138122: Allow tachyon to write and read binary output (#142730)
2025-12-22 23:57:20 +00:00
sha1module.c
gh-138342: Move _PyObject_VisitType() to the internal C API (#139734)
2025-10-08 12:10:58 +02:00
sha2module.c
gh-138342: Move _PyObject_VisitType() to the internal C API (#139734)
2025-10-08 12:10:58 +02:00
sha3module.c
gh-138342: Move _PyObject_VisitType() to the internal C API (#139734)
2025-10-08 12:10:58 +02:00
signalmodule.c
gh-67795: Accept any real numbers as timestamp and timeout (GH-139224)
2025-09-23 21:31:42 +03:00
socketmodule.c
gh-141817: Add IPV6_HDRINCL constant to the socket module (#141818)
2025-11-22 18:07:21 +01:00
socketmodule.h
gh-86819: Add ISO-TP CAN socket constants (#23794)
2025-09-17 17:18:04 +00:00
symtablemodule.c
gh-135801: Add the module parameter to compile() etc (GH-139652)
2025-11-13 13:21:32 +02:00
syslogmodule.c
gh-116738: Make syslog module thread-safe (#136760)
2025-07-21 09:24:42 -07:00
termios.c
GH-137623: Use an AC decorator for docstring line length enforcement (#137690)
2025-08-18 18:29:00 +01:00
timemodule.c
Remove internal _PyTime_AsLong() function (#141053)
2025-11-05 18:37:06 +01:00
tkappinit.c
…
tkinter.h
…
unicodedata_db.h
closes gh-138706: update Unicode to 17.0.0 (#138719)
2025-09-11 09:58:39 -07:00
unicodedata.c
gh-129117: Add unicodedata.isxidstart() function (#140269)
2025-10-30 10:18:12 +00:00
unicodename_db.h
closes gh-138706: update Unicode to 17.0.0 (#138719)
2025-09-11 09:58:39 -07:00
winreparse.h
…
xxlimited_35.c
gh-111178: Fix function signatures for multiple tests (#131496)
2025-03-20 12:27:03 +01:00
xxlimited.c
gh-134160: Add more comments for the xxlimited module (GH-140214)
2025-10-27 11:39:42 +01:00
xxmodule.c
gh-122040: reword Modules/xxmodule.c module-level comment (#132201)
2025-04-07 08:03:03 +00:00
xxsubtype.c
gh-111178: fix UBSan failures in Modules/xx*.c (GH-129797)
2025-02-25 13:02:32 +01:00
zlibmodule.c
gh-116738: Make zlib module thread-safe (gh-142432)
2025-12-12 13:14:42 -05:00

README 

Source files for standard library extension modules,
and former extension modules that are now builtin modules.