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https://issues.apache.org/jira/browse/CASSANDRA-12153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Lerer updated CASSANDRA-12153:
---------------------------------------
    Component/s:     (was: Coordination)
                 CQL

> RestrictionSet.hasIN() is slow
> ------------------------------
>
>                 Key: CASSANDRA-12153
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12153
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Tyler Hobbs
>            Assignee: Benjamin Lerer
>            Priority: Minor
>             Fix For: 3.10
>
>
> While profiling local in-memory reads for CASSANDRA-10993, I noticed that 
> {{RestrictionSet.hasIN()}} was responsible for about 1% of the time.  It 
> looks like it's mostly slow because it creates a new LinkedHashSet (which is 
> expensive to init) and uses streams.  This can be replaced with a simple for 
> loop.



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