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https://issues.apache.org/jira/browse/CASSANDRA-20816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitry Konstantinov updated CASSANDRA-20816:
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Attachment: ci_summary_trunk_ 20816.htm
results_details_trunk_ 20816.tar.xz
> Optimize MessagingService.getVersionOrdinal
> -------------------------------------------
>
> Key: CASSANDRA-20816
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20816
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Messaging/Internode
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Fix For: 5.x
>
> Attachments: 5.1_cpu.html, ci_summary_trunk_ 20816.htm,
> image-2025-08-04-19-55-41-878.png, results_details_trunk_ 20816.tar.xz
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Based on CPU profile we spend about 0.41% of CPU in
> MessagingService.getVersionOrdinal logic during a basic plain write stress
> test.
> The map lookup (with an implicit auto-boxing) can be replaced with a plain
> arithmetic operation.
> A unit test can be used to ensure that the assumption about serialization
> version incrementing for new versions is correct.
> !image-2025-08-04-19-55-41-878.png|width=700!
> [^5.1_cpu.html]
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