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https://issues.apache.org/jira/browse/CASSANDRA-12153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15373170#comment-15373170
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Tyler Hobbs commented on CASSANDRA-12153:
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Nice! I'm +1 on your code changes. Can you start a CI test run?
bq. PS: To be honest, I was not expecting that the use of new LinkHashSet,
stream() and lambdas was so bad from a performance point of view.
I was surprised by how much more expensive it was as well.
> RestrictionSet.hasIN() is slow
> ------------------------------
>
> Key: CASSANDRA-12153
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12153
> 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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