Matthias Boehm created SYSTEMML-1954: ----------------------------------------
Summary: Allocate rexpand output in CSR instead of MCSR Key: SYSTEMML-1954 URL: https://issues.apache.org/jira/browse/SYSTEMML-1954 Project: SystemML Issue Type: Sub-task Reporter: Matthias Boehm By default, we use the MCSR sparse format due to its flexibility on incremental updates. However, for permutation tables often created via {{rexpand}} (i.e., via table(seq,v)), we have exactly one non-zero per row which is the worst-case in terms of memory overhead. Since, we already have the abstract for different sparse representations, we should create CSR outputs for operations that are known to produce ultra sparse matrices. -- This message was sent by Atlassian JIRA (v6.4.14#64029)