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https://issues.apache.org/jira/browse/MAPREDUCE-4974?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gelesh updated MAPREDUCE-4974:
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Assignee: Gelesh (was: Arun A K)
Target Version/s: 0.23.5, 0.23.4, 2.0.1-alpha, 2.0.0-alpha, 1.1.1, 1.0.4,
1.0.0 (was: 1.0.0, 1.0.4, 1.1.1, 2.0.0-alpha, 2.0.1-alpha, 0.23.4, 0.23.5)
Status: Patch Available (was: Open)
> 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: 0.23.5, 2.0.2-alpha
> Environment: Hadoop Linux
> Reporter: Arun A K
> Assignee: Gelesh
> Labels: patch, performance
> Fix For: 0.20.204.0, 0.24.0
>
> 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.
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