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Posted to commits@cassandra.apache.org by "Benedict (JIRA)" <ji...@apache.org> on 2015/03/03 19:02:05 UTC

[jira] [Commented] (CASSANDRA-8730) Optimize UUIDType comparisons

    [ https://issues.apache.org/jira/browse/CASSANDRA-8730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14345416#comment-14345416 ] 

Benedict commented on CASSANDRA-8730:
-------------------------------------

I've pushed a small change with a very simple trick to permit both faster and simpler signed byte comparison of the LSB in TimeUUIDTyoe

> Optimize UUIDType comparisons
> -----------------------------
>
>                 Key: CASSANDRA-8730
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8730
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: J.B. Langston
>            Assignee: Benedict
>             Fix For: 3.0
>
>
> Compaction is slow on tables using compound keys containing UUIDs due to being CPU bound by key comparison.  [~benedict] said he sees some easy optimizations that could be made for UUID comparison.



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