[jira] [Commented] (MAHOUT-1873) Use densityAnalysis() in all necessary operations

["Andrew Palumbo (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15759920#comment-15759920 ] 

Andrew Palumbo commented on MAHOUT-1873:
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Bumping this up to critical since It could be a performance hit if we don't have it in the correct places or if we're doing it in more that one place for the same DRM eg. on the backend after an operation and then again before kryo  Serializes and then ships the results of the same matrix block. 

> Use densityAnalysis() in all necessary operations
> -------------------------------------------------
>
>                 Key: MAHOUT-1873
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1873
>             Project: Mahout
>          Issue Type: Improvement
>    Affects Versions: 0.12.2
>            Reporter: Andrew Palumbo
>            Assignee: Andrew Palumbo
>            Priority: Critical
>             Fix For: 0.13.0
>
>
> Find all places in which {{densityAnalysis(...)}} can be used to determine ideal matrix structure and implement it.  Eg in {{ABt}}, {{AtB}}, and possibly Kryo serializers.  Ensure when doing this that it is not redundant; Ie. the call is not made by both the Kryo serializer and the distributed operation.



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