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https://issues.apache.org/jira/browse/HDFS-554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13181931#comment-13181931
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Hudson commented on HDFS-554:
-----------------------------
Integrated in Hadoop-Hdfs-0.23-Build #131 (See
[https://builds.apache.org/job/Hadoop-Hdfs-0.23-Build/131/])
merge HDFS-2349, HDFS-2729, HDFS-2726, HDFS-554, HDFS-1314, HADOOP-7910 to
branch-0.23.
harsh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1228562
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> BlockInfo.ensureCapacity may get a speedup from System.arraycopy()
> ------------------------------------------------------------------
>
> Key: HDFS-554
> URL: https://issues.apache.org/jira/browse/HDFS-554
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.21.0
> Reporter: Steve Loughran
> Assignee: Harsh J
> Priority: Minor
> Fix For: 0.23.1
>
> Attachments: HDFS-554.patch, HDFS-554.txt, HDFS-554.txt
>
>
> BlockInfo.ensureCapacity() uses a for() loop to copy the old array data into
> the expanded array. {{System.arraycopy()}} is generally much faster for
> this, as it can do a bulk memory copy. There is also the typesafe Java6
> {{Arrays.copyOf()}} to consider, though here it offers no tangible benefit.
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