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Merged
merged 5 commits into from
Jan 14, 2025
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gh-118761: improve import time for pickle #128732

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e994e02
Improve import time of the `pickle` module.
picnixz Jan 10, 2025
6ce7785
blurb
picnixz Jan 10, 2025
2b7bfd9
Simplify `__all__` extension
picnixz Jan 12, 2025
4063875
PEP 8 (whitespace)
AA-Turner Jan 12, 2025
17242dd
update NEWS
picnixz Jan 14, 2025
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3 changes: 1 addition & 2 deletions Lib/pickle.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,7 +31,6 @@
import sys
from sys import maxsize
from struct import pack, unpack
import re
import io
import codecs
import _compat_pickle
Expand Down Expand Up @@ -188,7 +187,7 @@ def __init__(self, value):
NEXT_BUFFER = b'\x97' # push next out-of-band buffer
READONLY_BUFFER = b'\x98' # make top of stack readonly

__all__.extend([x for x in dir() if re.match("[A-Z][A-Z0-9_]+$", x)])
__all__.extend(x for x in dir() if x.isupper() and not x.startswith('_'))


class _Framer:
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2025-01-10-13-34-33.gh-issue-118761.qRB8nS.rst
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@@ -0,0 +1,3 @@
Improve import time of :mod:`pickle` by 25% by removing an unnecessary
regular expression. As such, :mod:`re` is no more implicitly available
as ``pickle.re``. Patch by Bénédikt Tran.
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