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https://issues.apache.org/jira/browse/SYSTEMML-1861?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Boehm resolved SYSTEMML-1861.
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Resolution: Done
Assignee: Matthias Boehm
Fix Version/s: SystemML 1.0
> Performance sparse-sparse binary ops
> ------------------------------------
>
> Key: SYSTEMML-1861
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1861
> Project: SystemML
> Issue Type: Task
> Reporter: Matthias Boehm
> Assignee: Matthias Boehm
> Fix For: SystemML 1.0
>
>
> This task aims to improve the performance of sparse-sparse binary operations
> such as elementwise multiply. Currently, we use a merge join with outer join
> semantics to cover the general case - for operations like multiply this is
> unnecessary and could be improved by using inner join semantics and
> branchless position maintenance.
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