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https://issues.apache.org/jira/browse/HBASE-15514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell resolved HBASE-15514.
-----------------------------------------
      Assignee:     (was: Vladimir Rodionov)
    Resolution: Not A Problem

> Single (or small number) of Column Family(ies) in Mutation optimization
> -----------------------------------------------------------------------
>
>                 Key: HBASE-15514
>                 URL: https://issues.apache.org/jira/browse/HBASE-15514
>             Project: HBase
>          Issue Type: Improvement
>          Components: Performance
>            Reporter: Vladimir Rodionov
>            Priority: Major
>
> familyMap in Mutation class is TreeMap<byte[], List<Cell>>. Overhead of 
> TreeMap - 48 bytes, TreeMap$Entry - 40 bytes. 



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