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https://issues.apache.org/jira/browse/HBASE-3928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13048464#comment-13048464
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Todd Lipcon commented on HBASE-3928:
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I ran some single-node benchmarks on my laptop. It doesn't seem to make a
significant difference either way. Since logic says it should help, may as well
commit it - certainly doesn't make things worse.
> Some potential performance improvements to Bytes/KeyValue
> ---------------------------------------------------------
>
> Key: HBASE-3928
> URL: https://issues.apache.org/jira/browse/HBASE-3928
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.92.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Critical
> Attachments: hbase-3928.txt
>
>
> We use Bytes.compareTo() a lot where we could be using a more efficient
> equals() method. The trick that makes equals() faster than compareTo is that
> we can short-circuit two common cases:
> Case 1) the length is not the same - only need to do one comparison
> Case 2) the two arrays have the same length and a common prefix: compare the
> last byte first, since it's the one most likely to differ (given we are
> usually comparing adjacent sorted data).
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