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gh-118761: Improve import time of the pickle module. (#128732)

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Importing `pickle` is now roughly 25% faster.

Importing the `re` module is no longer needed and
thus `re` is no more implicitly exposed as `pickle.re`.

---------

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
This commit is contained in:
Bénédikt Tran 2025-01-14 12:26:26 +01:00 • committed by GitHub
parent 1153e66e20
commit ff3e145b27
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2 changed files with 4 additions and 2 deletions
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3
Lib/pickle.py
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@ -31,7 +31,6 @@ from functools import partial
import sys import sys
from sys import maxsize from sys import maxsize
from struct import pack, unpack from struct import pack, unpack
import re
import io import io
import codecs import codecs
import _compat_pickle import _compat_pickle
@ -188,7 +187,7 @@ BYTEARRAY8 = b'\x96' # push bytearray
NEXT_BUFFER = b'\x97' # push next out-of-band buffer NEXT_BUFFER = b'\x97' # push next out-of-band buffer
READONLY_BUFFER = b'\x98' # make top of stack readonly 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: class _Framer:

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Misc/NEWS.d/next/Library/2025-01-10-13-34-33.gh-issue-118761.qRB8nS.rst Normal file
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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.