Closing issue as version 3.2 has been released on 2013-04-06.
> Faster implementation of FastMath.abs
> Key: MATH-954
> URL: https://issues.apache.org/jira/browse/MATH-954 > Project: Commons Math
> Issue Type: Improvement
> Affects Versions: 3.1.1
> Environment: java version "1.6.0_27"
> OpenJDK Runtime Environment (IcedTea6 1.12.4) (6b27-1.12.4-1)
> OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
> Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.39-2 x86_64 GNU/Linux
> Intel(R) Core(TM) i5-2500 CPU @ 3.30GHz
> Reporter: Charles Cooper
> Priority: Minor
> Labels: optimization, patch
> Fix For: 3.2
> Attachments: patch, patch
> Original Estimate: 0h
> Remaining Estimate: 0h
> Faster implementations of abs() which use bitwise operations in preference to branching. By my benchmark abs(double/float) are about 10-20% faster, and abs(long/int) more than twice as fast. Patch attached.
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