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From "Avery Ching (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GIRAPH-357) Don't try to combine if there is only one message
Date Sat, 06 Oct 2012 16:55:02 GMT

    [ https://issues.apache.org/jira/browse/GIRAPH-357?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471064#comment-13471064
] 

Avery Ching commented on GIRAPH-357:
------------------------------------

The only benefit compared to what you did is to avoid a few more checks (not much).  Maybe
we can just add arguments to determine the number of messages to combine with (client / server)?
 -1 indicates never combine?
                
> 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
>            Assignee: 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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