[jira] [Resolved] (SYSTEMML-1591) Improve efficiency sparse-unsafe cellwise operations

["Matthias Boehm (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SYSTEMML-1591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Boehm resolved SYSTEMML-1591.
--------------------------------------
       Resolution: Done
         Assignee: Matthias Boehm
    Fix Version/s:     (was: SystemML 0.14)
                   SystemML 1.0

> Improve efficiency sparse-unsafe cellwise operations
> ----------------------------------------------------
>
>                 Key: SYSTEMML-1591
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-1591
>             Project: SystemML
>          Issue Type: Sub-task
>          Components: Compiler, Runtime
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 1.0
>
>
> For sparse-unsafe cellwise operations, we currently iterate over all cells and use binary search to access the individual values. This is unnecessarily inefficient to should be reworked in favor of a sequential scan with gap handling, which would also allow us to consolidate the different code paths for sparse-safe and -unsafe operations.



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