[jira] [Commented] (RNG-111) Jenkins Small Fast generator

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[jira] [Commented] (RNG-111) Jenkins Small Fast generator

Gary D. Gregory (Jira)

    [ https://issues.apache.org/jira/browse/RNG-111?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931303#comment-16931303 ]

Alex D Herbert commented on RNG-111:
------------------------------------

I was waiting for the stress test results.

Here they are:
{noformat}
RNG     Dieharder       TestU01 (BigCrush)
JSF_32  0,0,0,0,0       0,0,0,1,1        
JSF_64  0,0,0,0,0       1,1,0,0,0
{noformat}
Failures are sporadic:
||RandomSource||Test||Failures||Failed||
|JSF_32|TestU01 (BigCrush)|1|47 MaxOft AD,t = 16|
|JSF_32|TestU01 (BigCrush)|1|55 SampleCorr,k = 1|
|JSF_64|TestU01 (BigCrush)|1|76 RandomWalk1 C (L=1000,r=0)|
|JSF_64|TestU01 (BigCrush)|1|78 RandomWalk1 C (L=10000,r=0)|

> Jenkins Small Fast generator
> ----------------------------
>
>                 Key: RNG-111
>                 URL: https://issues.apache.org/jira/browse/RNG-111
>             Project: Commons RNG
>          Issue Type: Improvement
>          Components: core
>    Affects Versions: 1.3
>            Reporter: Alex D Herbert
>            Priority: Minor
>
> Implement Bob Jenkins' Small/Fast Chaotic PRNG.
> [A small noncryptographic PRNG|http://burtleburtle.net/bob/rand/smallprng.html]
> Variants are provided for 32-bit and 64-bit output. The generators use bit shifts to avalanche state and many variants are provided for different shift combinations. However there is a recommended variant that has been more extensively tested. A seeding routine is provided to ensure that generators with short cycles are avoided.
> This generator has no name but appears in PractRand as JSF (Jenkins Small Fast).



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