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https://issues.apache.org/jira/browse/HDFS-1777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13010240#comment-13010240
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Aaron T. Myers commented on HDFS-1777:
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Before we go whole-hog on this, can we please make sure to do a little
benchmarking? Java is pretty good at optimizing for repeated strings, so there
may not be much performance to gain here.
> HDFS Log improvement Umbrella
> -----------------------------
>
> Key: HDFS-1777
> URL: https://issues.apache.org/jira/browse/HDFS-1777
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: data-node, name-node
> Reporter: Uma Maheswara Rao G
> Assignee: Uma Maheswara Rao G
>
> In log messages we used so many '+' operators to construct the message. So
> many string object creations will happen. Instead we can use StringBuilder
> and append all the strings to it.So, we can avoid unncessary String object
> creations.
> So created one Umbrella issue and we can link the all log improvement issues
> to it.
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