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Date: Mon, 6 May 2013 19:22:16 +0000 (UTC)
From: "Dave Brosius (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12646277.1367868046909.275208.1367868136686@arcas>
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Subject: [jira] [Created] (CASSANDRA-5541) Reduce Empty Map allocations in
 RowMutation (modifications)
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Dave Brosius created CASSANDRA-5541:
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             Summary: 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


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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