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Date: Wed, 21 Oct 2009 05:17:59 +0000 (UTC)
From: "Edward J. Yoon (JIRA)" <jira@apache.org>
To: hama-dev@incubator.apache.org
Subject: [jira] Resolved: (HAMA-3) Lazy Evaluation
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     [ https://issues.apache.org/jira/browse/HAMA-3?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Edward J. Yoon resolved HAMA-3.
-------------------------------

    Resolution: Won't Fix

won't fix.

> Lazy Evaluation
> ---------------
>
>                 Key: HAMA-3
>                 URL: https://issues.apache.org/jira/browse/HAMA-3
>             Project: Hama
>          Issue Type: Improvement
>          Components: matrix
>            Reporter: Edward J. Yoon
>            Assignee: Chanwit Kaewkasi
>
> What do you think if we could support lazy evaluation rather than direct
> computation?
> Say, we have:
> Matrix x = a * b + c 
> Should we construct the evaluation tree, internally, like:
> +-- c
> |
> *-- b
> |
> a
> before perform the real computing.
> This probably lets us doing some re-arrangement of the expression and
> picking the right algorithm before start computation.

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