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Posted to issues@systemml.apache.org by "Glenn Weidner (JIRA)" <ji...@apache.org> on 2017/09/09 03:58:00 UTC

[jira] [Updated] (SYSTEMML-1861) Performance sparse-sparse binary ops

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

Glenn Weidner updated SYSTEMML-1861:
------------------------------------
    Fix Version/s:     (was: SystemML 1.0)
                   SystemML 0.15

> 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 0.15
>
>
> 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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