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https://issues.apache.org/jira/browse/RNG-57?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16694670#comment-16694670
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Alex D Herbert commented on RNG-57:
-----------------------------------
{quote}we provide a robust script that will start "DieHarder" and "[Big]Crush"
{quote}
I already had to write a script to parse the output and generate a table for
this ticket. Surely you also have scripts that you are using to create the user
guide?
I was going to submit the changes I made to {{examples-stress}} to build the
shaded jar file as a PR. I could add my scripts. However they are far from
robust. If this is a desired output, e.g. for RNG-29, then some more work
should be done to make the executable jar files with a {{main}} a bit more user
friendly, e.g. a decent help message.
{quote}What can we conclude from that?
{quote}
Not much. The dieharder_dna test is marked as suspect anyway. Literally it
would mean do not use that RNG to generate 4 letter DNA sequences using
consecutive 2-bit letters from the {{int}}. This does have implications for the
{{StringSampler}} discussed in RNG-54 since that is exactly what was discussed
(for any power of 2 alphabet).
> 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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