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gh-118761: substitute re import in base64.b16decode for a more efficient alternative #128736

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Merged
AA-Turner merged 8 commits into from
Jan 14, 2025
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gh-118761: substitute re import in base64.b16decode for a more efficient alternative #128736

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3a92fce
Improve import time of the `base64` module.
picnixz Jan 10, 2025
0b52712
blurb
picnixz Jan 10, 2025
d7b6253
Improve `base64.b16decode()` by a factor 10.
picnixz Jan 13, 2025
9e8fe5d
update NEWS
picnixz Jan 13, 2025
5be6178
Update Misc/NEWS.d/next/Library/2025-01-10-13-06-54.gh-issue-118761.f…
picnixz Jan 13, 2025
b36d915
add What's New entry
picnixz Jan 14, 2025
5562c81
Update Doc/whatsnew/3.14.rst
picnixz Jan 14, 2025
82d18d7
Update Misc/NEWS.d/next/Library/2025-01-10-13-06-54.gh-issue-118761.f…
picnixz Jan 14, 2025
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3 changes: 2 additions & 1 deletion Lib/base64.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,6 @@
# Modified 30-Dec-2003 by Barry Warsaw to add full RFC 3548 support
# Modified 22-May-2007 by Guido van Rossum to use bytes everywhere

import re
import struct
import binascii

Expand Down Expand Up @@ -281,6 +280,8 @@ def b16decode(s, casefold=False):
s is incorrectly padded or if there are non-alphabet characters present
in the input.
"""
import re

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s = _bytes_from_decode_data(s)
if casefold:
s = s.upper()
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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2025-01-10-13-06-54.gh-issue-118761.f8oADD.rst
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@@ -0,0 +1,2 @@
Improve import time of :mod:`base64` by a factor six. This is achieved by
importing :mod:`re` on demand. Patch by Bénédikt Tran.