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Posted to issues@systemml.apache.org by "Glenn Weidner (JIRA)" <ji...@apache.org> on 2017/09/09 02:11:00 UTC

[jira] [Updated] (SYSTEMML-1754) Performance removeEmpty w/ shallow copy if unmodified

     [ https://issues.apache.org/jira/browse/SYSTEMML-1754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Glenn Weidner updated SYSTEMML-1754:
------------------------------------
    Fix Version/s:     (was: SystemML 1.0)
                   SystemML 0.15

> Performance removeEmpty w/ shallow copy if unmodified
> -----------------------------------------------------
>
>                 Key: SYSTEMML-1754
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1754
>             Project: SystemML
>          Issue Type: Task
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 0.15
>
>
> Often removeEmpty is used to guard against special cases with entirely empty rows or columns. In case of no removed rows or columns the full copy into the output is unnecessarily inefficient. This task aims to modify removeEmpty rows/cols for both dense and sparse matrices to leverage a shallow copy if determined output dimensions match the input dimensions.



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