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https://issues.apache.org/jira/browse/CASSANDRA-9706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14611786#comment-14611786
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Sylvain Lebresne commented on CASSANDRA-9706:
---------------------------------------------
+1
> Precompute ColumnIdentifier comparison
> --------------------------------------
>
> Key: CASSANDRA-9706
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9706
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
> Assignee: Benedict
> Priority: Minor
> Fix For: 3.0 beta 1
>
>
> Follow up to CASSANDRA-9701. I had hoped to precompute a total order on the
> ColumnIdentifier, but decided this would be too risky, with the necessary
> periodic rebalancing. So instead, I've hoisted the first 8 bytes of any name
> into a long which we can compare to short-circuit all of the expensive work
> of ByteBufferUtil.compareUnsigned, making this another very trivial patch (of
> debatable necessity to be distinct, but I've already snuck one extra change
> in to the previous ticket).
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