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https://issues.apache.org/jira/browse/CASSANDRA-21725?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-21725:
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Change Category: Performance
Complexity: Normal
Status: Open (was: Triage Needed)
> Use SWAR for fast ASCII check in UTF8Serializer.UTF8Validator
> -------------------------------------------------------------
>
> Key: CASSANDRA-21725
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21725
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Local/Other
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
>
> To speed up the ASCII check path in UTF8Serializer.UTF8Validator, we can use
> SWAR.
> Another option would be to use vector API but we have to support older
> versions of JDK + vector API is still in incubator..
> Auto-vectorization unfortunately does not work for this logic in JDK21.
> In preliminary microbenchmarks I have SWAR and vector API produces similar
> results.
> Evaluated options:
> https://github.com/netudima/java-perf-tests/tree/main/src/main/java/org/github/netudima/perf/tests/utf8
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