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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2017/12/01 08:25:01 UTC

[jira] [Updated] (SYSTEMML-2034) Performance issue sparse-dense maxpooling backward

     [ https://issues.apache.org/jira/browse/SYSTEMML-2034?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Boehm updated SYSTEMML-2034:
-------------------------------------
    Description: The current implementation of sparse-dense maxpooling_backward uses for every p-q combination a full scan over the sparse row just to find the applicable range. We should instead flip this dense implementation to a "real" sparse implementation that scans the sparse input just once.

> Performance issue sparse-dense maxpooling backward
> --------------------------------------------------
>
>                 Key: SYSTEMML-2034
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2034
>             Project: SystemML
>          Issue Type: Bug
>            Reporter: Matthias Boehm
>
> The current implementation of sparse-dense maxpooling_backward uses for every p-q combination a full scan over the sparse row just to find the applicable range. We should instead flip this dense implementation to a "real" sparse implementation that scans the sparse input just once.



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