Matthias Boehm created SYSTEMML-2174: ----------------------------------------
Summary: Ultra-sparse cpmm empty block pruning
Key: SYSTEMML-2174
URL: https://issues.apache.org/jira/browse/SYSTEMML-2174
Project: SystemML
Issue Type: Sub-task
Reporter: Matthias Boehm
For spark cpmm instructions with a single output block, we should prune empty
blocks before the join and before aggregation.
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