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https://issues.apache.org/jira/browse/HBASE-12060?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14144312#comment-14144312
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Lars Hofhansl commented on HBASE-12060:
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Shame that Javac/JIT does not do this optimization itself.
> Replace enhanced for statement with basic for statement where possible
> ----------------------------------------------------------------------
>
> Key: HBASE-12060
> URL: https://issues.apache.org/jira/browse/HBASE-12060
> Project: HBase
> Issue Type: Sub-task
> Reporter: Andrew Purtell
> Labels: beginner, beginners
>
> Wherever we use the enhanced for construction:
> {noformat}
> for ( FormalParameter : Expression ) Statement
> {noformat}
> where the Expression evaluates to an array or collection type that supports
> random access, we can avoid creating iterator objects, unless we are also
> using the iterator to remove items while iterating by using the basic for
> statement instead:
> {noformat}
> for ( ForInit ; Expression ; ForUpdate ) Statement
> {noformat}
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