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https://issues.apache.org/jira/browse/GIRAPH-613?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13626981#comment-13626981
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Maja Kabiljo commented on GIRAPH-613:
-------------------------------------

Ok then, unless somebody else has arguments against, I'm +1 on the idea.
                
> Remove Writable from the interfaces implemented by Vertex
> ---------------------------------------------------------
>
>                 Key: GIRAPH-613
>                 URL: https://issues.apache.org/jira/browse/GIRAPH-613
>             Project: Giraph
>          Issue Type: Improvement
>            Reporter: Claudio Martella
>            Priority: Minor
>         Attachments: NonWritable.diff
>
>
> Currently, Vertex implements Writable, meaning that we depend on the user 
> (except for the default implementation) on the way the graph is serialised 
> and deserialized. This means we cannot do certain optimisations, and the user 
> can actually add additional stuff to Vertex more than Value, Id, Edges and 
> halt state. By removing this possibility (or allowing them to extend a 
> default implementation) we take control of this.

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