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https://issues.apache.org/jira/browse/LUCENE-1607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12704306#action_12704306
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Yonik Seeley commented on LUCENE-1607:
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The last patch removed the ability to plug a different implementation, but I
guess we don't need that until we have another implementation (and it's not
clear if the benefits of dumping String.intern() compatability in the future
outweigh the disadvantages of breaking back compatibility).
I plan on committing this shortly.
> String.intern() faster alternative
> ----------------------------------
>
> Key: LUCENE-1607
> URL: https://issues.apache.org/jira/browse/LUCENE-1607
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Earwin Burrfoot
> Fix For: 2.9
>
> Attachments: intern.patch, LUCENE-1607.patch, LUCENE-1607.patch,
> LUCENE-1607.patch, LUCENE-1607.patch, LUCENE-1607.patch
>
>
> By using our own interned string pool on top of default, String.intern() can
> be greatly optimized.
> On my setup (java 6) this alternative runs ~15.8x faster for already interned
> strings, and ~2.2x faster for 'new String(interned)'
> For java 5 and 4 speedup is lower, but still considerable.
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