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Posted to issues@systemml.apache.org by "Matthias Boehm (JIRA)" <ji...@apache.org> on 2017/12/31 06:55:00 UTC

[jira] [Closed] (SYSTEMML-2054) Performance features sparse-sparse leftindexing

     [ https://issues.apache.org/jira/browse/SYSTEMML-2054?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Matthias Boehm closed SYSTEMML-2054.
------------------------------------
       Resolution: Fixed
         Assignee: Matthias Boehm
    Fix Version/s: SystemML 1.1

> Performance features sparse-sparse leftindexing
> -----------------------------------------------
>
>                 Key: SYSTEMML-2054
>                 URL: https://issues.apache.org/jira/browse/SYSTEMML-2054
>             Project: SystemML
>          Issue Type: Task
>            Reporter: Matthias Boehm
>            Assignee: Matthias Boehm
>             Fix For: SystemML 1.1
>
>
> This task aims to improve the sparse-sparse left indexing performance, which includes:
> * Shallow copy of sparse rows into empty target rows (0 aligned)
> * Exact preallocation of sparse rows for coping rows into empty target rows (not 0 aligned)
> * New set index range with input sparse row to avoid repeated binary search and shifting.



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