[SYSTEMDS-1861] Performance sparse-sparse binary ops

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Done
• Fix Version/s: SystemML 0.15
• Assignee: Matthias Boehm
• Reporter: Matthias Boehm
• Created: 23/Aug/17 05:06
• Updated: 09/Sep/17 03:57
• Resolved: 02/Sep/17 23:36

Description

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.