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https://issues.apache.org/jira/browse/CASSANDRA-20167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17912205#comment-17912205
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Jordan West commented on CASSANDRA-20167:
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[~mck] I think we should take the discussion of performance improvements to the
mailing list in the context of "what constitutes a bug" or what we are willing
to merge into actively supported releases. I was commenting recently on
CASSANDRA-15452, I think its wrong to require users of active releases to do a
major version upgrade to get performance benefits. We should be considering 4.x
a target as well imo.
> Reduce memory allocations in miscellaneous places along write path
> ------------------------------------------------------------------
>
> Key: CASSANDRA-20167
> URL: https://issues.apache.org/jira/browse/CASSANDRA-20167
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Consistency/Coordination, Local/Other
> Reporter: Dmitry Konstantinov
> Assignee: Dmitry Konstantinov
> Priority: Normal
> Fix For: 5.0.x
>
> Attachments: ci_summary_netudima_20167-5.0_147.html,
> image-2024-12-26-22-01-32-592.png, image-2024-12-26-22-01-55-614.png,
> image-2024-12-26-22-02-44-040.png, image-2024-12-26-22-03-49-018.png,
> results_details_netudima_20167-5.0_147.tar.xz
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Avoid unnecessary allocations in different places along write path:
> * avoid iterator allocations if possible
> * handle typical cases (such as a single row, single table writes) more
> efficiently
> * add fast paths for typical scenarios (like pending ranges is empty)
> * memorize things which can be computed once
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