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https://issues.apache.org/jira/browse/LUCENE-3654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13173976#comment-13173976
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Uwe Schindler commented on LUCENE-3654:
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bq. can we have some -DXX:LuceneUseUnsafe option to enable this. I mean there
are two camps here and that could make everybody happy? I mean if you use this
option you have to expect possible problems no?
We can put the whole comparator to contrib and BytesRef can have a static
setter to change the default impl. Or we use SPI for it (contrib exports it in
META-INF) :-)
> Optimize BytesRef comparator to use Unsafe long based comparison (when
> possible)
> --------------------------------------------------------------------------------
>
> Key: LUCENE-3654
> URL: https://issues.apache.org/jira/browse/LUCENE-3654
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/index, core/search
> Reporter: Shay Banon
> Attachments: LUCENE-3654.patch
>
>
> Inspire by Google Guava UnsignedBytes lexi comparator, that uses unsafe to do
> long based comparisons over the bytes instead of one by one (which yields
> 2-4x better perf), use similar logic in BytesRef comparator. The code was
> adapted to support offset/length.
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