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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (SYSTEMML-1861) Performance sparse-sparse binary ops
Date Sat, 02 Sep 2017 23:37:00 GMT

     [ https://issues.apache.org/jira/browse/SYSTEMML-1861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Matthias Boehm closed SYSTEMML-1861.
------------------------------------

> Performance sparse-sparse binary ops
> ------------------------------------
>
>                 Key: SYSTEMML-1861
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1861
>             Project: SystemML
>          Issue Type: Task
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 1.0
>
>
> This task aims to improve the performance of sparse-sparse binary operations such as
elementwise multiply. Currently, we use a merge join with outer join semantics to cover the
general case - for operations like multiply this is unnecessary and could be improved by using
inner join semantics and branchless position maintenance.



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