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https://issues.apache.org/jira/browse/HADOOP-19875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18077163#comment-18077163
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Tsz-wo Sze commented on HADOOP-19875:
-------------------------------------
- before
{code}
Result) 10 x 100000000 computations:
galoisFieldMultiply: 18.889s (5294086.51 ops)
multiplyCrc32 : 8.554s (11690437.22 ops)
multiplyCrc32 is 120.82% faster
{code}
- after
{code}
Result) 10 x 100000000 computations:
galoisFieldMultiply: 18.852s (53044769.79 ops)
tableMultiply : 6.647s (150443809.24 ops)
tableMultiply ops is 183.62% faster
{code}
> Further improve CrcComposer performance
> ---------------------------------------
>
> Key: HADOOP-19875
> URL: https://issues.apache.org/jira/browse/HADOOP-19875
> Project: Hadoop Common
> Issue Type: Improvement
> Components: common
> Reporter: Tsz-wo Sze
> Assignee: Tsz-wo Sze
> Priority: Major
>
> In HDDS-10489, we found that using LongToIntFunction instead of
> ToIntFunction<Long> can further improve the performance.
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