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https://issues.apache.org/jira/browse/HADOOP-6166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12734693#action_12734693
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Tsz Wo (Nicholas), SZE commented on HADOOP-6166:
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Yeah, the speed depends on many platform dependent details like cache size,
32-bit/64-bit, etc. So reducing the number of operations in the CRC algorithm
may not lead to a better performance.
I tried more varieties like Crc32_6_4 but my implementation did not perform
well. We should run benchmark on Scott's.
> Improve PureJavaCrc32
> ---------------------
>
> Key: HADOOP-6166
> URL: https://issues.apache.org/jira/browse/HADOOP-6166
> Project: Hadoop Common
> Issue Type: Improvement
> Components: util
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Tsz Wo (Nicholas), SZE
> Attachments: c6166_20090722.patch, c6166_20090722_benchmark_32VM.txt,
> c6166_20090722_benchmark_64VM.txt
>
>
> Got some ideas to improve CRC32 calculation.
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