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https://issues.apache.org/jira/browse/LUCENE-3654?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-3654.
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Resolution: Implemented
Since LUCENE-7966, when using Java 9 or higher, BytesRef comparators will use
Arrays#compareUnsigned and Arrays#equals which can compare multiple bytes at
once.
> 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 - Core
> Issue Type: Improvement
> Components: core/index, core/search
> Reporter: Shay Banon
> Priority: Major
> 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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