[New-bugs-announce] [issue16674] Faster getrandbits() for small integers

[Serhiy Storchaka]

New submission from Serhiy Storchaka:

The proposed patch adds a fast patch for generating small integers (the most common use case).

Microbenchmark:
$ ./python -m timeit -s "import random; r=random.getrandbits; n=30"  "r(n);r(n);r(n);r(n);r(n);r(n);r(n);r(n);r(n);r(n)"

Non patched: 4.27 usec per loop
Patched: 2.97 usec per loop

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components: Extension Modules
files: random_getrandbits_fastpath.patch
keywords: patch
messages: 177436
nosy: mark.dickinson, rhettinger, serhiy.storchaka
priority: normal
severity: normal
stage: patch review
status: open
title: Faster getrandbits() for small integers
type: performance
versions: Python 3.4
Added file: http://bugs.python.org/file28304/random_getrandbits_fastpath.patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue16674>
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