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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 edited comment on LUCENE-1607 at 4/20/09 8:55 AM:
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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 than simple
String.intern(). There could be other implementations that do resizing 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.
was (Author: [email protected]):
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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