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https://issues.apache.org/jira/browse/HBASE-28025?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Peter Somogyi reopened HBASE-28025:
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Reopening to apply addendum for branch-2.4.
> Enhance ByteBufferUtils.findCommonPrefix to compare 8 bytes each time
> ---------------------------------------------------------------------
>
> Key: HBASE-28025
> URL: https://issues.apache.org/jira/browse/HBASE-28025
> Project: HBase
> Issue Type: Improvement
> Components: Performance
> Affects Versions: 2.5.4
> Reporter: Becker Ewing
> Assignee: Becker Ewing
> Priority: Major
> Fix For: 2.6.0, 2.4.18, 2.5.6, 3.0.0-beta-1
>
> Attachments: HBASE-28025_jmh_benchmarks_src.zip, benchmark_results.txt
>
>
> Currently, the `ByteBufferUtils.findCommonPrefix family of methods compare
> two buffers a single byte at a time. In reviewing the patch for HBASE-28012,
> [~zhangduo] suggested that the ByteBufferUtils.findCommonPrefix methods could
> be enhanced to compare 8 bytes at a time like the
> ByteBufferUtils.compareToUnsafe family of methods already does (which was
> added in HBASE-12345)
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