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https://issues.apache.org/jira/browse/CASSANDRA-7244?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benedict updated CASSANDRA-7244:
--------------------------------
Description: In QueryOptions.Codec.Flag.deserialize() we call
Flag.values(), which constructs a copy of the Enum array each time. Since we
only use this lookup the enums, and since it happens _often_, this is pretty
wasteful. It seems to make a slight (barely perceptible) difference to
throughput, but worth fixing either way. (was: In
QueryOptions.Codec.Flag.deserialize() we call Flag.values(), which constructs a
copy of the Enum array each time. Since we only use this lookup the enums, and
since it happens _often_, this is pretty wasteful. It seems to make a few %
difference to throughput.)
> Don't allocate a Codec.Flag enum value array on every read
> ----------------------------------------------------------
>
> Key: CASSANDRA-7244
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7244
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Benedict
> Assignee: Benedict
> Priority: Minor
> Labels: performance
> Fix For: 2.1 rc1
>
> Attachments: 7244.txt
>
>
> In QueryOptions.Codec.Flag.deserialize() we call Flag.values(), which
> constructs a copy of the Enum array each time. Since we only use this lookup
> the enums, and since it happens _often_, this is pretty wasteful. It seems to
> make a slight (barely perceptible) difference to throughput, but worth fixing
> either way.
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