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From "Edward J. Yoon (JIRA)" <j...@apache.org>
Subject [jira] Created: (HAMA-3) Lazy Evaluation
Date Tue, 24 Jun 2008 10:54:44 GMT
Lazy Evaluation
---------------

                 Key: HAMA-3
                 URL: https://issues.apache.org/jira/browse/HAMA-3
             Project: Hama
          Issue Type: Improvement
            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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