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From "Paolo Castagna (JIRA)" <>
Subject [jira] [Commented] (GIRAPH-126) Use Collections.emptyList() in
Date Wed, 30 May 2012 14:12:24 GMT


Paolo Castagna commented on GIRAPH-126:

This might not be necessary and/or a problem any more if Netty replaces Hadoop RPC (see: GIRAPH-37).
> Use Collections.emptyList() in
> ----------------------------------------------------------
>                 Key: GIRAPH-126
>                 URL:
>             Project: Giraph
>          Issue Type: Improvement
>            Reporter: André Kelpe
>            Assignee: André Kelpe
>            Priority: Minor
>         Attachments: GIRAPH-126.patch, GIRAPH-126.patch, GIRAPH-126.patch
> I am doing some tests with giraph and I am having some memory problems. While I was browsing
through the codebase I saw that you are allocating a new ArrayList (which has an underlying
array of 10 elements) for each Vertex, that has no Messages to be delivered. That's a waste
of memory and time. This patch replaces it with the EMPTY_LIST of the Collections utility

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