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https://issues.apache.org/jira/browse/CASSANDRA-1244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884464#action_12884464
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Jonathan Ellis commented on CASSANDRA-1244:
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how many of these are actually demonstrably not premature optimization?

the loop unrolling, for instance, is definitely something I would expect the 
JIT to do automatically

> FBUtilities: small performance fixes and clean-ups
> --------------------------------------------------
>
>                 Key: CASSANDRA-1244
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1244
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Folke Behrens
>            Priority: Trivial
>         Attachments: FBUtilities-minor-perf-fixes.txt
>
>
> The following patch (against trunk) changes several methods in FBUtilities. 
> Makes them faster and/or cleaner.
> One method will be removed: encodedUTF8Length(). It does not detect surrogate 
> pairs (4-bytes sequences) and isn't used anywhere.

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