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cpython/Lib
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Pablo Galindo Salgado 661df25692
gh-149584: Fix excessive overhead in the Tachyon profiler regarding the cache behavior (#149649) 
Use exact remote reads for interpreter state, thread state, and
interpreter frame structs instead of pulling full remote pages into the
profiler page cache. This matches the core change from
python/cpython#149585.

The profiler clears the page cache between samples, so live entries are
always packed at the front. Track the live count and only clear/search
that prefix instead of scanning all 1024 slots on the hot path.

Use the frame cache to predict the next thread state and top frame
address, then batch interpreter/thread/frame reads with process_vm_readv
when profiling a Linux target. Reuse prefetched frame buffers in the
frame walker when the prediction is valid.

Cache the last FrameInfo tuple per code object/instruction offset, reuse
cached thread id objects, and append cached parent frames directly on
full frame-cache hits. This cuts Python allocation churn in the
steady-state profiler path.
2026-05-20 04:32:08 -07:00
..
__phello__
_pyrepl gh-130472: Use fancycompleter in import completions (#148188) 2026-05-05 01:36:43 +00:00
asyncio gh-149600: Remove deprecated asyncio.iscoroutinefunction function (#149601) 2026-05-12 22:59:46 +05:30
collections gh-147957: pop items from UserDict in LIFO order (gh-147958) 2026-04-14 23:29:41 -05:00
compression gh-132983: Split `_zstd_set_c_parameters` (#133921) 2025-05-28 14:45:08 +00:00
concurrent Fix pyflakes warnings: variable is assigned to but never used (#142294) 2025-12-08 14:00:31 +01:00
ctypes gh-149831: Fix ctypes DLL library name on Cygwin (#149832) 2026-05-15 14:29:26 +00:00
curses gh-146153: Use frozendict in pure python fallback for curses.has_key (#146154) 2026-03-21 14:06:07 +01:00
dbm Fix typo: 'exept' -> 'except' in Lib/dbm/dumb.py (GH-144060) 2026-01-20 08:50:34 +02:00
email gh-128110: Fix rfc2047 whitespace handling in email parser address headers (#130749) 2026-05-11 18:20:09 -04:00
encodings gh-149801: Add IANA registered names and aliases with leading zeros (GH-149804) 2026-05-15 14:34:48 +03:00
ensurepip gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
html gh-140875: Fix handling of unclosed charrefs before EOF in HTMLParser (GH-140904) 2025-11-19 13:55:10 +02:00
http gh-149144: Use decodeURIComponent() for UTF-8 support in js_output() (GH-149157) 2026-05-14 23:10:39 +02:00
idlelib gh-139551: add support for BaseExceptionGroup in IDLE (GH-139563) 2026-04-12 10:06:41 -07:00
importlib GH-83065: Fix import deadlock by implementing hierarchical module locking (GH-137196) 2026-04-28 01:06:23 -07:00
json gh-146061: Clarify indent=None in json docs (GH-146095) 2026-05-11 11:14:54 +00:00
logging gh-149598: Remove strm argument support from logging handlers (#149599) 2026-05-11 03:05:56 +03:00
multiprocessing gh-149879: Fix multiprocessing tests on Cygwin (#150031) 2026-05-19 00:45:35 +02:00
pathlib gh-86533: Restore os.makedirs() ability to apply *mode* recursively (GH-150011) 2026-05-18 23:00:27 +00:00
profiling gh-149584: Fix excessive overhead in the Tachyon profiler regarding the cache behavior (#149649) 2026-05-20 04:32:08 -07:00
pydoc_data Python 3.15.0b1 2026-05-07 16:26:31 +03:00
re gh-86519: Add prefixmatch APIs to the re module (GH-31137) 2026-02-15 17:43:39 -08:00
site-packages
sqlite3 gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
string GH-132661: Add `string.templatelib.convert()` (#135217) 2025-07-15 11:56:42 +02:00
sysconfig gh-149499: Fixes for 3.16 bump (GH-149500) 2026-05-07 19:06:37 +00:00
test gh-149584: Fix excessive overhead in the Tachyon profiler regarding the cache behavior (#149649) 2026-05-20 04:32:08 -07:00
tkinter gh-47655: Add support for user data and detail of Tk events to tkinter (GH-7142) 2026-02-25 10:34:00 +02:00
tomllib Update mypy to 2.1.0 (#149709) 2026-05-12 08:40:51 +00:00
turtledemo gh-137586: Open external osascript program with absolute path (GH-137584) 2026-04-06 09:42:10 -07:00
unittest gh-149600: Remove deprecated asyncio.iscoroutinefunction function (#149601) 2026-05-12 22:59:46 +05:30
urllib gh-106693: Revert "Explicitly mark ob_sval as unsigned char to avoid UB (#106826)" (#149514) 2026-05-07 23:39:08 +03:00
venv gh-149701: Fully silence potential hash -r error (GH-149702) 2026-05-13 08:59:57 +01:00
wsgiref gh-144370: Disallow usage of control characters in status in wsgiref.handlers for security (#144371) 2026-03-06 13:22:21 +01:00
xml gh-139489: Add is_valid_text to xml.__all__ (#149641) 2026-05-10 13:43:57 -07:00
xmlrpc gh-136839: Refactor simple dict.update calls (#136811) 2025-07-19 10:12:10 -07:00
zipfile gh-134261: ZipFile - Don't rely on local time for reproducible builds & tests (#134264) 2026-05-20 01:36:19 +00:00
zoneinfo gh-145883: Fix two heap-buffer-overflows in _zoneinfo (#145885) 2026-04-04 13:29:17 +01:00
__future__.py
__hello__.py
_aix_support.py
_android_support.py gh-144415: Android testbed fixes (#142912) 2026-02-03 16:37:34 +08:00
_apple_support.py
_ast_unparse.py gh-143055: Fix crash in AST unparser when unparsing dict comprehension unpacking (#145556) 2026-03-09 10:37:23 -07:00
_collections_abc.py gh-141510, PEP 814: Add built-in frozendict type (#144757) 2026-02-17 10:54:41 +01:00
_colorize.py gh-148352: Add more colour to calendar CLI output (#148354) 2026-05-04 15:14:57 +03:00
_compat_pickle.py gh-142349: Implement PEP 810 - Explicit lazy imports (#142351) 2026-02-12 00:15:33 +00:00
_ios_support.py
_markupbase.py
_opcode_metadata.py GH-143732: SEND specialization (GH-148963) 2026-05-05 15:19:16 +01:00
_osx_support.py gh-136677: Introduce executable specific linker flags to configure (#137296) 2026-02-24 22:52:02 +00:00
_py_abc.py
_py_warnings.py gh-143231: Add the module attribute to warnings.WarningMessage (GH-149298) 2026-05-03 09:35:47 +00:00
_pydatetime.py gh-97517: Add documentation links to datetime strftime/strptime docstrings (#138559) 2025-09-15 19:50:46 +01:00
_pydecimal.py gh-76007: Deprecate __version__ attribute in decimal (#140302) 2025-10-26 12:01:04 +01:00
_pyio.py gh-141968: Use take_bytes to remove copy in _pyio.BytesIO.read() (#149850) 2026-05-19 00:48:41 +00:00
_pylong.py
_sitebuiltins.py gh-145035: Allows removing the _pyrepl module to completely disable the modern REPL (GH-145159) 2026-03-10 14:58:32 +01:00
_strptime.py GH-70647: Remove support for %d (and deprecate for %e) without year in strptime() (GH-144570) 2026-04-14 17:15:27 -07:00
_threading_local.py Fix pyflakes warnings: variable is assigned to but never used (#142294) 2025-12-08 14:00:31 +01:00
_weakrefset.py
abc.py
annotationlib.py gh-149528: Remove annotationlib.ForwardRef._evaluate for 3.16 (#149529) 2026-05-08 07:48:15 +03:00
antigravity.py
argparse.py gh-149614 - Restore deepcopiability of argparse.ArgumentParser instances (#149617) 2026-05-11 15:28:23 +00:00
ast.py gh-140344: ast: Add deprecation warnings (#140345) 2026-05-18 11:20:49 -07:00
base64.py gh-134837: Correct and improve base85 documentation for base64 and binascii modules (GH-145843) 2026-05-12 22:46:46 +03:00
bdb.py gh-136057: Allow step and next to step over for loops (#136160) 2025-11-16 13:57:07 -08:00
bisect.py
bz2.py
calendar.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
cmd.py
code.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
codecs.py gh-52876: Implement missing parameter in codecs.StreamReaderWriter functions (#136498) 2025-07-10 17:42:14 +02:00
codeop.py Fix pyflakes warnings: variable is assigned to but never used (#142294) 2025-12-08 14:00:31 +01:00
colorsys.py
compileall.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
configparser.py gh-148370: prevent quadratic behavior in configparser.ParsingError.combine (#148452) 2026-04-14 00:32:54 +02:00
contextlib.py gh-125862: Keep ContextDecorator open across generator/coroutine execution (GH-136212) 2026-04-28 05:26:38 +00:00
contextvars.py
copy.py gh-141510: Fix copy.deepcopy() for recursive frozendict (#145027) 2026-02-21 15:30:40 +00:00
copyreg.py
cProfile.py Remove unused imports (#142320) 2025-12-06 11:27:31 +00:00
csv.py gh-137627: Make csv.Sniffer.sniff() delimiter detection 1.6x faster (#137628) 2025-10-23 15:28:29 +03:00
dataclasses.py gh-79413: Add qualname parameter to dataclass.make_dataclass. (GH-150026) 2026-05-18 19:55:47 -04:00
datetime.py
decimal.py gh-76007: Deprecate __version__ attribute in decimal (#140302) 2025-10-26 12:01:04 +01:00
difflib.py gh-144384: Lazily import _colorize (#149318) 2026-05-06 16:07:43 +00:00
dis.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
doctest.py gh-144384: Lazily import _colorize (#149318) 2026-05-06 16:07:43 +00:00
enum.py gh-140806: add docs for enum.bin function (#140807) 2026-01-12 13:34:18 +02:00
filecmp.py
fileinput.py
fnmatch.py
fractions.py gh-87790: support thousands separators for formatting fractional part of Fraction (#132204) 2025-07-07 11:16:31 +03:00
ftplib.py gh-87451: Apply CVE-2021-4189 PASV fix to ftplib.ftpcp() (GH-149648) 2026-05-13 17:33:43 +00:00
functools.py gh-149083: Convert _initial_missing for pure py reduce to sentinel (#149536) 2026-05-09 10:55:09 +03:00
genericpath.py gh-74453: Deprecate os.path.commonprefix (#144436) 2026-02-05 22:37:05 +02:00
getopt.py
getpass.py gh-138577: Fix keyboard shortcuts in getpass with echo_char (#141597) 2026-03-30 11:11:13 +02:00
gettext.py gh-141510: Use frozendict in the stdlib (#144909) 2026-03-06 10:25:09 +01:00
glob.py gh-144835: Added missing explanations for some parameters in glob and iglob. (#144836) 2026-03-02 08:56:28 -03:00
graphlib.py GH-143948: Explain graphlib's cycle-finding code (#143950) 2026-01-20 19:28:48 -06:00
gzip.py gh-149945: Fix potential OOM for gzip with large header (GH-149979) 2026-05-19 19:20:01 +03:00
hashlib.py gh-136565: use SHA-256 for hashlib.__doc__ example instead of MD5 (#138157) 2025-08-26 10:38:53 +00:00
heapq.py Indexing is more straight-forward (and faster) than unpacking (gh-145154) 2026-02-23 12:31:35 -06:00
hmac.py gh-142451: correctly copy HMAC attributes in HMAC.copy() (#142510) 2025-12-14 09:45:36 +01:00
imaplib.py gh-142307: deprecate legacy support for altering IMAP4.file (#142335) 2026-05-06 17:41:26 +03:00
inspect.py gh-149083: use sentinel to fix _functools.reduce() signature (#149591) 2026-05-10 15:22:16 -07:00
io.py
ipaddress.py gh-141497: Make ipaddress.IP{v4,v6}Network.hosts() always returning an iterator (GH-141547) 2025-11-17 19:29:06 +02:00
keyword.py gh-142349: Implement PEP 810 - Explicit lazy imports (#142351) 2026-02-12 00:15:33 +00:00
linecache.py gh-122255: Synchronize warnings in C and Python implementations of the warnings module (GH-122824) 2025-11-14 16:49:28 +02:00
locale.py gh-140924: In locale module, add missing names to __all__ (GH-140925) 2026-05-11 17:21:03 +03:00
lzma.py
mailbox.py bpo-32234: Allow mailbox instances as context managers (GH-4770) 2026-02-16 14:14:26 +01:00
mimetypes.py gh-149720: Remove support for undotted ext in mimetypes.MimeType.add_type (#149721) 2026-05-12 13:40:21 +00:00
modulefinder.py gh-84530: fix namespace package support in modulefinder (#29196) 2025-12-09 15:50:50 +00:00
netrc.py gh-139633: Run netrc file permission check only once per parse (GH-139634) 2026-03-30 22:05:18 +03:00
ntpath.py Fix pyflakes warnings: variable is assigned to but never used (#142294) 2025-12-08 14:00:31 +01:00
nturl2path.py
numbers.py gh-122450: Expand documentation for `Rational and Fraction` (#136800) 2025-08-04 02:15:59 +00:00
opcode.py gh-150027: Avoid copying during construction of frozenset objects (GH-150028) 2026-05-19 13:57:37 -04:00
operator.py
optparse.py gh-141510: Use frozendict in the stdlib (#144909) 2026-03-06 10:25:09 +01:00
os.py gh-86533: Restore os.makedirs() ability to apply *mode* recursively (GH-150011) 2026-05-18 23:00:27 +00:00
pdb.py gh-148615: Handle -- separator in pdb argument parsing (#148624) 2026-05-05 21:22:58 -07:00
pickle.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
pickletools.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
pkgutil.py gh-148641: Implement PEP 829 - startup configuration files (#149109) 2026-05-03 17:17:29 +00:00
platform.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
plistlib.py gh-141510: Support frozendict in plistlib (#145590) 2026-03-31 15:45:23 +03:00
poplib.py gh-143923: Reject control characters in POP3 commands 2026-01-20 20:46:32 +00:00
posixpath.py gh-74453: Deprecate os.path.commonprefix (#144436) 2026-02-05 22:37:05 +02:00
pprint.py gh-149189: Modern defaults for pprint (#149190) 2026-05-05 15:04:05 +03:00
profile.py GH-65961: Stop setting __cached__ on modules (GH-142165) 2025-12-11 11:44:46 -08:00
pstats.py gh-140137: Handle empty collections in profiling.sampling (#140154) 2025-10-15 14:59:12 +01:00
pty.py
py_compile.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
pyclbr.py Fix pyflakes warnings: variable is assigned to but never used (#142294) 2025-12-08 14:00:31 +01:00
pydoc.py gh-142349: Add help("lazy") support (#149886) 2026-05-15 16:30:40 +00:00
queue.py Fix Queue.shutdown docs for condition to unblock a join (gh-137088) 2025-07-25 07:56:28 -06:00
quopri.py
random.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
reprlib.py gh-135487: fix reprlib.Repr.repr_int when given very large integers (#135506) 2025-06-24 11:09:46 +00:00
rlcompleter.py gh-112821: Fix rlcompleter failures on objects with descriptors (#149577) 2026-05-10 21:44:59 -04:00
runpy.py gh-149117: Set ImportError.name on errors from runpy.run_module/run_path (gh-149159) 2026-05-02 12:27:23 +10:00
sched.py
secrets.py
selectors.py
shelve.py Drop three unused imports (#141875) 2025-11-23 16:33:05 +00:00
shlex.py gh-138804: Check type in shlex.quote (GH-138809) 2025-09-12 14:26:21 -04:00
shutil.py gh-149567: Remove deprecated shutil.ExecError (#149568) 2026-05-15 18:54:05 +01:00
signal.py gh-149879: Fix test_signal on Cygwin (#149896) 2026-05-15 21:32:10 +02:00
site.py gh-149504: Fix re-entrancy bug when .pth/.start file invokes site.addsitedir() (#149659) 2026-05-13 16:45:25 +00:00
smtplib.py gh-70039: smtplib: store the server name in ._host in .connect() (#115259) 2026-04-08 17:46:25 -04:00
socket.py gh-148599: Update WSA socket error codes (#148033) 2026-05-06 19:52:23 +02:00
socketserver.py gh-76007: Deprecate __version__ attribute (#138675) 2025-09-29 12:03:23 +03:00
ssl.py gh-141510: Use frozendict in the stdlib (#144909) 2026-03-06 10:25:09 +01:00
stat.py gh-144050: Fix stat.filemode pure Python file type detection (GH-144059) 2026-01-20 14:05:42 +02:00
statistics.py statistics: Fix geometric_mean() error message for negative inputs (#149246) 2026-05-01 22:54:24 -05:00
stringprep.py
struct.py
subprocess.py gh-47798: Refactor the POSIX subprocess.Popen._communicate selector loop into helpers (GH-149032) 2026-04-27 00:40:20 +00:00
symtable.py gh-149530: Remove symtable.Class.get_methods deprecated method (#149531) 2026-05-09 08:33:09 +00:00
tabnanny.py gh-76007: Deprecate __version__ attribute (#138675) 2025-09-29 12:03:23 +03:00
tarfile.py gh-149980: Strip all trailing slashes from GNU long directory names in tarfile (GH-150019) 2026-05-18 19:31:15 +00:00
tempfile.py gh-66305: Fix a hang on Windows in the tempfile module (GH-144672) 2026-02-24 13:05:06 +02:00
textwrap.py gh-139065: Fix trailing space before long word in textwrap (GH-139070) 2025-10-10 16:29:18 +03:00
this.py
threading.py gh-124397: Add free-threading support for iterators. (gh-148894) 2026-05-01 16:31:00 -05:00
timeit.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
token.py
tokenize.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
trace.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
traceback.py gh-146406: add clear() cross-language hint for immutable types (GH-149927) 2026-05-19 23:01:15 -04:00
tracemalloc.py
tty.py
turtle.py Fix pyflakes warnings: variable is assigned to but never used (#142294) 2025-12-08 14:00:31 +01:00
types.py gh-142349: Implement PEP 810 - Explicit lazy imports (#142351) 2026-02-12 00:15:33 +00:00
typing.py gh-149528: Remove annotationlib.ForwardRef._evaluate for 3.16 (#149529) 2026-05-08 07:48:15 +03:00
uuid.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
warnings.py
wave.py gh-117716: Fix wave RIFF padding for data chunks (GH-145237) 2026-04-15 14:21:43 +02:00
weakref.py gh-124748: Fix handling kwargs in WeakKeyDictionary.update() (#124783) 2026-02-18 13:17:08 +00:00
webbrowser.py gh-137586: Replace 'osascript' with 'open' on macOS in webbrowser (#146439) 2026-05-06 16:56:17 +03:00
zipapp.py gh-142389: Add backticks to stdlib argparse help to display in colour (#149384) 2026-05-04 22:23:18 +00:00
zipimport.py gh-135801: Add the module parameter to compile() etc (GH-139652) 2025-11-13 13:21:32 +02:00