https://github.com/python/cpython/commit/1121c80fdad1fc1a175f4691f33272cf28a66e83
commit: 1121c80fdad1fc1a175f4691f33272cf28a66e83
branch: main
author: Grigory Bukovsky <32143244+booqoff...@users.noreply.github.com>
committer: sobolevn <m...@sobolevn.me>
date: 2025-03-14T01:57:38+03:00
summary:
gh-131196: Improve perfomance of `UUID.hex` and `UUID.__str__` by ~10% (#131197)
Results before and after the fix:
```
hex
before: 0.021755493999989994
after: 0.01465080400066654
str
before: 0.06381790500017814
after: 0.05134949700004654
```
Co-authored-by: Bénédikt Tran <10796600+picn...@users.noreply.github.com>
files:
A Misc/NEWS.d/next/Library/2025-03-13-19-53-57.gh-issue-131196.3sBFv2.rst
M Lib/uuid.py
diff --git a/Lib/uuid.py b/Lib/uuid.py
index 7a12b48cb008f1..6f7a7a3f42ac11 100644
--- a/Lib/uuid.py
+++ b/Lib/uuid.py
@@ -321,9 +321,8 @@ def __setattr__(self, name, value):
raise TypeError('UUID objects are immutable')
def __str__(self):
- hex = '%032x' % self.int
- return '%s-%s-%s-%s-%s' % (
- hex[:8], hex[8:12], hex[12:16], hex[16:20], hex[20:])
+ x = self.hex
+ return f'{x[:8]}-{x[8:12]}-{x[12:16]}-{x[16:20]}-{x[20:]}'
@property
def bytes(self):
@@ -387,7 +386,7 @@ def node(self):
@property
def hex(self):
- return '%032x' % self.int
+ return self.bytes.hex()
@property
def urn(self):
diff --git
a/Misc/NEWS.d/next/Library/2025-03-13-19-53-57.gh-issue-131196.3sBFv2.rst
b/Misc/NEWS.d/next/Library/2025-03-13-19-53-57.gh-issue-131196.3sBFv2.rst
new file mode 100644
index 00000000000000..72c10fe57e8dad
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-03-13-19-53-57.gh-issue-131196.3sBFv2.rst
@@ -0,0 +1 @@
+Improve perfomance of :attr:`uuid.UUID.hex` and :meth:`uuid.UUID.__str__
<object.__str__>`.
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