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https://issues.apache.org/jira/browse/HADOOP-14313?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15973581#comment-15973581
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Steve Loughran commented on HADOOP-14313:
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Looking at the hadoop code, that was lifted from Guava many years ago. We
either maintain that or switch to the guava one. Probably easiest just to move
to Guava unless we really don't trust them for stability/perf
> Replace/improve Hadoop's byte[] comparator
> ------------------------------------------
>
> Key: HADOOP-14313
> URL: https://issues.apache.org/jira/browse/HADOOP-14313
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Reporter: Vikas Vishwakarma
> Attachments: HADOOP-14313.master.001.patch
>
>
> Hi,
> Recently we were looking at the Lexicographic byte array comparison in HBase.
> We did microbenchmark for the byte array comparator of HADOOP (
> https://github.com/hanborq/hadoop/blob/master/src/core/org/apache/hadoop/io/FastByteComparisons.java#L161
> ) , HBase Vs the latest byte array comparator from guava (
> https://github.com/google/guava/blob/master/guava/src/com/google/common/primitives/UnsignedBytes.java#L362
> ) and observed that the guava main branch version is much faster.
> Specifically we see very good improvement when the byteArraySize%8 != 0 and
> also for large byte arrays. I will update the benchmark results using JMH for
> Hadoop vs Guava. For the jira on HBase, please refer HBASE-17877.
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