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https://issues.apache.org/jira/browse/CASSANDRA-5541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13650277#comment-13650277
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Dave Brosius commented on CASSANDRA-5541:
-----------------------------------------
yes much better. +1
> Reduce Empty Map allocations in RowMutation (modifications)
> -----------------------------------------------------------
>
> Key: CASSANDRA-5541
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5541
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 2.0
> Reporter: Dave Brosius
> Assignee: Dave Brosius
> Priority: Trivial
> Fix For: 2.0
>
> Attachments: 5541.txt, 5541-v2.txt
>
>
> The constructor
> public RowMutation(String table, ByteBuffer key)
> was generation tons of empty HashMaps that were unused, on the order of
> 160,000 of them in about a minute.
> delay creating the map until you need it.
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