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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2017/07/09 06:26:00 UTC

[jira] [Closed] (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 ]

Matthias Boehm closed SYSTEMML-1754.
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> 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 1.0
>
>
> 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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