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Posted to dev@giraph.apache.org by "Maja Kabiljo (JIRA)" <ji...@apache.org> on 2012/10/05 17:24:02 UTC

[jira] [Updated] (GIRAPH-357) Don't try to combine if there is only one message

     [ https://issues.apache.org/jira/browse/GIRAPH-357?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Maja Kabiljo updated GIRAPH-357:
--------------------------------

    Attachment: GIRAPH-357.patch
    
> 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
>         Attachments: GIRAPH-357.patch
>
>
> 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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