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https://issues.apache.org/jira/browse/CASSANDRA-15393?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Blake Eggleston updated CASSANDRA-15393:
----------------------------------------
    Source Control Link: 
https://github.com/apache/cassandra/commit/ccab496d2d37c86341d364dea6c27513fda27331
             Resolution: Fixed
                 Status: Resolved  (was: Ready to Commit)

committed to trunk. Thanks for the review [~maedhroz] & [~marcuse]!

> Add byte array backed cells
> ---------------------------
>
>                 Key: CASSANDRA-15393
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15393
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: Local/Compaction
>            Reporter: Blake Eggleston
>            Assignee: Blake Eggleston
>            Priority: Normal
>             Fix For: 4.0-beta
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> We currently materialize all values as on heap byte buffers. Byte buffers 
> have a fairly high overhead given how frequently they’re used, and on the 
> compaction and local read path we don’t do anything that needs them. Use of 
> byte buffer methods only happens on the coordinator. Using cells that are 
> backed by byte arrays instead in these situations reduces compaction and read 
> garbage up to 22% in many cases.



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