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https://issues.apache.org/jira/browse/HDFS-9557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15059508#comment-15059508
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Chris Nauroth commented on HDFS-9557:
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Daryn, could you please review the test failures? I quickly ruled out the
javac and Checkstyle warnings. They appear to be unrelated/unaddressable
within the scope of this patch.
> Reduce object allocation in PB conversion
> -----------------------------------------
>
> Key: HDFS-9557
> URL: https://issues.apache.org/jira/browse/HDFS-9557
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs-client
> Affects Versions: 2.8.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Attachments: HDFS-9557.patch, HDFS-9557.patch
>
>
> PB conversions use {{ByteString.copyFrom}} to populate the builder.
> Unfortunately this creates unique instances for empty arrays instead of
> returning the singleton {{ByteString.EMPTY}}.
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