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https://issues.apache.org/jira/browse/MATH-1564?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17246011#comment-17246011
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Alex Herbert commented on MATH-1564:
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The {{array.length}} is a public final member of the array set during
initialisation:
[JLS 10.7 Array
Members|https://docs.oracle.com/javase/specs/jls/se8/html/jls-10.html#jls-10.7]
So what you are doing is copying an int value locally rather than accessing it
from memory. This is a micro optimisation. If there was a noticeable difference
in runtime then this would be an easy target for the JIT compiler designers to
optimise and I presume they already have.
> Minor improvement
> -----------------
>
> Key: MATH-1564
> URL: https://issues.apache.org/jira/browse/MATH-1564
> Project: Commons Math
> Issue Type: Improvement
> Reporter: Arturo Bernal
> Priority: Major
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Minor improvement
> * extra computations by getting the string size only once
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