Matthias Boehm created SYSTEMML-1838:
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Summary: Performance issues sparse/ultra-sparse binary read
Key: SYSTEMML-1838
URL: https://issues.apache.org/jira/browse/SYSTEMML-1838
Project: SystemML
Issue Type: Bug
Reporter: Matthias Boehm
Recent experiments with PageRank (20 iterations) on a 1M x 1M, sp=0.001 input
showed that the actual iterations are indeed very fast, at peak memory
bandwidth (i.e., ~500ms per iteration in CP only) but the initial read is
unnecessarily slow, and thus dominating the entire execution time. For example,
in this scenario, the read took 41s.
This task aims to improve the read performance of sparse and ultra-sparse
matrices into CP.
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