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From "Matthias Boehm (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (SYSTEMML-1754) Performance removeEmpty w/ shallow copy if unmodified
Date Sun, 09 Jul 2017 06:26:00 GMT

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

Matthias Boehm closed SYSTEMML-1754.
------------------------------------

> 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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