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https://issues.apache.org/jira/browse/LUCENE-1607?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yonik Seeley updated LUCENE-1607:
---------------------------------
Attachment: LUCENE-1607.patch
Latest patch attached with multi-threaded test.
Some quick performance tests:
10240 unique strings, 100 threads: 29% faster (larger than the cache capacity
- will lead to evictions)
100 unique strings, 100 threads: 147% faster
100 unique strings, 2 threads: 152% faster
Times were simply the time it took the junit test to run - includes other
overhead like random number generation and error checking.
> 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, 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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