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gh-150226: Speed up uuid.UUID string parsing #150227

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gh-150226: Speed up uuid.UUID string parsing #150227

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6 changes: 5 additions & 1 deletion Lib/uuid.py
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Original file line number Diff line number Diff line change
Expand Up @@ -213,8 +213,12 @@ def __init__(self, hex=None, bytes=None, bytes_le=None, fields=None,
if int is not None:
pass
elif hex is not None:
hex = hex.replace('urn:', '').replace('uuid:', '')
original_hex = hex
hex = hex.removeprefix('urn:uuid:')
hex = hex.strip('{}').replace('-', '')
if len(hex) != 32:
hex = original_hex.replace('urn:', '').replace('uuid:', '')
hex = hex.strip('{}').replace('-', '')
if len(hex) != 32:
raise ValueError('badly formed hexadecimal UUID string')
int = int_(hex, 16)
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Library/2026-05-22-12-10-00.gh-issue-150226.uuid-perf.rst
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@@ -0,0 +1 @@
Speed up construction of :class:`uuid.UUID` from documented string formats.
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