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https://issues.apache.org/jira/browse/GIRAPH-701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13725438#comment-13725438
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Jesse commented on GIRAPH-701:
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Messages are serialized and copied out when sending. So you can reuse the
message object in your vertex compute method.
> Communication improvement using one-to-all message sending
> ----------------------------------------------------------
>
> Key: GIRAPH-701
> URL: https://issues.apache.org/jira/browse/GIRAPH-701
> Project: Giraph
> Issue Type: New Feature
> Reporter: Jesse
> Attachments: GIRAPH-701.patch
>
>
> Using one-to-all message sending to send one message copy to multiple target
> vertices on the same worker.
> To enable this feature, use conf.enableOneToAllMsgSending().
> Pagerank benchmarking (Partitions: 640, Edges per vertex: 500, Vertices:
> 200000000, Workers: 40)
> shows that the time per superstep is reduced by 40%.
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