[jira] [Commented] (RNG-57) CachedUniformRandomProvider for nextBoolean() and nextInt()

[ASF GitHub Bot (JIRA)]

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https://issues.apache.org/jira/browse/RNG-57?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16689751#comment-16689751
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ASF GitHub Bot commented on RNG-57:
-----------------------------------

Github user coveralls commented on the issue:

    https://github.com/apache/commons-rng/pull/12
  
    
    [![Coverage 
Status](https://coveralls.io/builds/20148825/badge)](https://coveralls.io/builds/20148825)
    
    Coverage decreased (-0.2%) to 97.358% when pulling 
**91a5eec2d8a3318cf8fc8e6d222ac3edf3a0d969 on aherbert:improvement-RNG-57** 
into **0fdcd9007c708aa48f1989cb2211ea56c1fcd702 on apache:master**.



> CachedUniformRandomProvider for nextBoolean() and nextInt()
> -----------------------------------------------------------
>
>                 Key: RNG-57
>                 URL: https://issues.apache.org/jira/browse/RNG-57
>             Project: Commons RNG
>          Issue Type: Improvement
>          Components: core
>            Reporter: Alex D Herbert
>            Priority: Minor
>              Labels: performance
>             Fix For: 1.2
>
>
> Implement a wrapper around a {{UniformRandomProvider}} that can cache the 
> underlying source of random bytes for use in the methods {{nextBoolean()}} 
> and {{nextInt()}} (in the case of {{LongProvider}}). E.g.
> {code:java}
> LongProvider provider = RandomSource.create(RandomSource.SPLIT_MIX_64);
> CachedLongProvider rng = new CachedLongProvider(provider);
> // Uses cached nextLong() 64 times
> rng.nextBoolean();
> // Uses cached nextLong() twice
> rng.nextInt();
> IntProvider provider = RandomSource.create(RandomSource.KISS);
> CachedIntProvider rng2 = new CachedIntProvider(provider);
> // Uses cached nextInt() 32 times
> rng2.nextBoolean();
> // This could be wrapped by a factory method:
> UniformRandomProvider rng = CachedUniformRandomProviderFactory.wrap(
>         // Any supported source: IntProvider or LongProvider
>         RandomSource.create(RandomSource...));
> {code}
> The implementation should be speed tested to determine the benefit for 
> {{nextBoolean()}} and if {{nextInt()}} can be improved for {{LongProviders}}.



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