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