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From "Dave Brosius (JIRA)" <>
Subject [jira] [Created] (CASSANDRA-5541) Reduce Empty Map allocations in RowMutation (modifications)
Date Mon, 06 May 2013 19:22:16 GMT
Dave Brosius created CASSANDRA-5541:

             Summary: Reduce Empty Map allocations in RowMutation (modifications)
                 Key: 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

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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