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https://issues.apache.org/jira/browse/HADOOP-8462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13568385#comment-13568385
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Govind Kamat commented on HADOOP-8462:
--------------------------------------
The native-code codec shows a performance improvement of 10 to 15% over the
pure-Java version using GridMix. With Intel's IPP libraries, the improvement
is in the range of 50% or more.
> Native-code implementation of bzip2 codec
> -----------------------------------------
>
> Key: HADOOP-8462
> URL: https://issues.apache.org/jira/browse/HADOOP-8462
> Project: Hadoop Common
> Issue Type: Improvement
> Components: io
> Affects Versions: 0.23.1
> Reporter: Govind Kamat
> Attachments: HADOOP-8462-2.0.2a.patch, HADOOP-8462-trunk.patch
>
> Original Estimate: 672h
> Remaining Estimate: 672h
>
> The bzip2 codec supplied with Hadoop is currently available only as a Java
> implementation. A version that uses the system bzip2 library can provide
> improved performance and a better memory footprint. This will also make it
> feasible to utilize alternative bzip2 libraries that may perform better for
> specific jobs.
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