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https://issues.apache.org/jira/browse/CASSANDRA-7096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14153783#comment-14153783
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Jonathan Ellis commented on CASSANDRA-7096:
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Ooh, I haven't used the branch compare link before.  Useful!

> Evaluate murmur hash of token only once
> ---------------------------------------
>
>                 Key: CASSANDRA-7096
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7096
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Benedict
>            Assignee: Branimir Lambov
>            Priority: Minor
>              Labels: performance
>             Fix For: 3.0
>
>
> Every bloom filter lookup we perform recalculates the murmur hash for the 
> token. I propose we extend DecoratedKey for the purposes of reads only, and 
> attach the full murmur hash to it so that we can pass these directly to the 
> bloom filter.



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