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From "Tyler Hobbs (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-12153) RestrictionSet.hasIN() is slow
Date Fri, 08 Jul 2016 17:47:11 GMT


Tyler Hobbs updated CASSANDRA-12153:
    Reviewer: Benjamin Lerer
      Status: Patch Available  (was: Open)

Patch and pending CI runs:


I also replaced {{hasOnlyEqualityRestrictions()}} with a simple for-loop while I was at it.

> RestrictionSet.hasIN() is slow
> ------------------------------
>                 Key: CASSANDRA-12153
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Coordination
>            Reporter: Tyler Hobbs
>            Assignee: Tyler Hobbs
>            Priority: Minor
>             Fix For: 3.x
> 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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