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https://issues.apache.org/jira/browse/LUCENE-5959?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14137449#comment-14137449
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Markus Heiden commented on LUCENE-5959:
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A better approach would be to create the Automaton with the correct size in
Builder.finish() instead of creating it in the constructor with a default size.
But I don't know if there may be changes to Builder.a prior to calling
Build.finish(), so I choose that safe approach in the patch.
> Optimized memory management in Automaton.Builder.finish()
> ---------------------------------------------------------
>
> Key: LUCENE-5959
> URL: https://issues.apache.org/jira/browse/LUCENE-5959
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/other
> Affects Versions: 4.10
> Reporter: Markus Heiden
> Priority: Minor
> Labels: patch
> Attachments: finish.patch
>
>
> Reworked Automaton.Builder.finish() to not allocate memory stepwise. Added
> growTransitions(int numTransitions) to be able to resize the transistions
> array just once.
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