[
https://issues.apache.org/jira/browse/RNG-57?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16688914#comment-16688914
]
Gilles commented on RNG-57:
---------------------------
bq. Is there a guide for how to run DieHarder
There is a {{RandomStressTester}} Java application class under directory
{{commons-rng-examples/examples-stress}}.
It can start the "dieharder" program (to be installed separately). See the
comments in the Java file.
bq. and BigCrush?
There is a little "bridge", in C, under
{{commons-rng-examples/examples-stress/src/main/c}}.
After compiling it (after having installed "TestU01" separately), it can be run
through the above Java application.
bq. make the test suite more robust
I've created RNG-60 as step in that direction (and perhaps it will be "good
enough").
> 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}}.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
