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https://issues.apache.org/jira/browse/LUCENE-1607?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12700827#action_12700827
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Yonik Seeley commented on LUCENE-1607:
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bq. lack of collision resolve
My version was the most basic... a simple cache that is not guaranteed to
always hit. I also wanted to keep the overhead very low in case of misses
(hence no re-probing). In the best case, I don't think one can get much
faster... and in the worst case it won't be much slower. There could be other
implementations of course...
bq. It'll break on non-power-of-two sizes.
The size is guaranteed to be a power of two by the constructor.
> 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
>
>
> 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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