Matthias Boehm created SYSTEMML-1955:
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Summary: Ultra-sparse matrix multiply for large ultra-sparse
matrices
Key: SYSTEMML-1955
URL: https://issues.apache.org/jira/browse/SYSTEMML-1955
Project: SystemML
Issue Type: Sub-task
Reporter: Matthias Boehm
Our code path for ultra-sparse matrix multiplies has a condition on the
sparsity but also the absolute number of non-zeros in order to avoid
unnecessary overhead in CP where the entire matrix is a single block. However,
there are use cases, where this approach leads to large allocated dense outputs
although the output is sparse as well.
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