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https://issues.apache.org/jira/browse/MATH-1339?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15203574#comment-15203574
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Gilles commented on MATH-1339:
------------------------------
Proposed fix available in branch "feature-MATH-1339".
> "shuffle" in "MathArrays"
> -------------------------
>
> Key: MATH-1339
> URL: https://issues.apache.org/jira/browse/MATH-1339
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Gilles
> Assignee: Gilles
> Priority: Minor
> Labels: performance
> Fix For: 4.0
>
>
> Method {{shuffle}} creates an instance of {{UniformIntegerDistribution}} for
> each entry of the list to be shuffled. Then {{sample()}} is called on each
> instance, which in turn will call {{nextInt()}} on the provided RNG.
> The same effect could be achieved more efficiently by calling
> {{nextInt(int)}} directly on the provided RNG, followed by an addition.
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