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gh-109653: Reduce import overhead of uuid module on Linux (#115160)

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This follows in the footsteps of #21586
This speeds up import uuid by about 6ms on Linux.

Before:
```
λ hyperfine -w 4 "./python -c 'import uuid'"
Benchmark 1: ./python -c 'import uuid'
  Time (mean ± σ):      20.4 ms ±   0.4 ms    [User: 16.7 ms, System: 3.8 ms]
  Range (min … max):    19.6 ms …  21.8 ms    136 runs
```
After:
```
λ hyperfine -w 4 "./python -c 'import uuid'"
Benchmark 1: ./python -c 'import uuid'
  Time (mean ± σ):      14.5 ms ±   0.3 ms    [User: 11.5 ms, System: 3.2 ms]
  Range (min … max):    13.9 ms …  16.0 ms    175 runs
```
This commit is contained in:
Shantanu 2024-03-06 14:39:43 -08:00 • committed by GitHub
parent 0876b921b2
commit 68b8ffff8c
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2 changed files with 5 additions and 1 deletions
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5
Lib/uuid.py
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@ -53,8 +53,11 @@ from enum import Enum, _simple_enum
__author__ = 'Ka-Ping Yee <ping@zesty.ca>' __author__ = 'Ka-Ping Yee <ping@zesty.ca>'
# The recognized platforms - known behaviors # The recognized platforms - known behaviors
if sys.platform in ('win32', 'darwin', 'emscripten', 'wasi'): if sys.platform in {'win32', 'darwin', 'emscripten', 'wasi'}:
_AIX = _LINUX = False _AIX = _LINUX = False
elif sys.platform == 'linux':
_LINUX = True
_AIX = False
else: else:
import platform import platform
_platform_system = platform.system() _platform_system = platform.system()

1
Misc/NEWS.d/next/Documentation/2024-02-08-08-51-37.gh-issue-109653.QHLW4w.rst Normal file
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@ -0,0 +1 @@
Improve import time of :mod:`uuid` on Linux.