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Date: Fri, 28 Aug 2015 07:51:46 +0000 (UTC)
From: "Benedict (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (CASSANDRA-10193) Improve Rows.diff and Rows.merge
 efficiency; downgrade Row.columns() to Collection<ColumnDefinition>
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     [ https://issues.apache.org/jira/browse/CASSANDRA-10193?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Benedict updated CASSANDRA-10193:
---------------------------------
    Summary: Improve Rows.diff and Rows.merge efficiency; downgrade Row.columns() to Collection<ColumnDefinition>  (was: Downgrade Row.columns() to Collection<ColumnDefinition>)

> Improve Rows.diff and Rows.merge efficiency; downgrade Row.columns() to Collection<ColumnDefinition>
> ----------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-10193
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10193
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Benedict
>            Assignee: Benedict
>             Fix For: 3.0.0 rc1
>
>
> There's not really a lot of reason to store a Columns instance in each row. Retaining it introduces extra costs on every row merge, in both consumed CPU time and heap. 
> While working on CASSANDRA-10045 it became apparent this would be very easy to remove, however to avoid scope creep I have filed this as a follow up ticket.



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