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From "Maja Kabiljo (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GIRAPH-357) Don't try to combine if there is only one message
Date Fri, 05 Oct 2012 15:22:04 GMT
Maja Kabiljo created GIRAPH-357:
-----------------------------------

             Summary: Don't try to combine if there is only one message
                 Key: GIRAPH-357
                 URL: https://issues.apache.org/jira/browse/GIRAPH-357
             Project: Giraph
          Issue Type: Improvement
            Reporter: Maja Kabiljo


In SendMessageCache, we call combiner even if we have just one message. Combining is kind
of expensive since we recreate the message object and the list. With default settings and
bigger graph, for PageRankBenchmark there is 10-15% superstep speedup if we don't call it
when we have a single message.

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