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Hudson commented on MAPREDUCE-4974: ----------------------------------- Integrated in Hadoop-Hdfs-trunk #1374 (See [https://builds.apache.org/job/Hadoop-Hdfs-trunk/1374/]) MAPREDUCE-4974. Optimising the LineRecordReader initialize() method (Gelesh via bobby) (Revision 1468232) Result = FAILURE bobby : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1468232 Files : * /hadoop/common/trunk/hadoop-mapreduce-project/CHANGES.txt * /hadoop/common/trunk/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/lib/input/LineRecordReader.java > Optimising the LineRecordReader initialize() method > --------------------------------------------------- > > Key: MAPREDUCE-4974 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4974 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: mrv1, mrv2, performance > Affects Versions: 2.0.2-alpha, 0.23.5 > Environment: Hadoop Linux > Reporter: Arun A K > Assignee: Gelesh > Labels: patch, performance > Fix For: trunk, 2.0.5-beta > > Attachments: MAPREDUCE-4974.2.patch, MAPREDUCE-4974.3.patch, > MAPREDUCE-4974.4.patch, MAPREDUCE-4974.5.patch > > Original Estimate: 1h > Remaining Estimate: 1h > > I found there is a a scope of optimizing the code, over initialize() if we > have compressionCodecs & codec instantiated only if its a compressed input. > Mean while Gelesh George Omathil, added if we could avoid the null check of > key & value. This would time save, since for every next key value generation, > null check is done. The intention being to instantiate only once and avoid > NPE as well. Hope both could be met if initialize key & value over > initialize() method. We both have worked on it. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira