Fokko Driesprong created SPARK-12869:
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Summary: Optimize conversion from BlockMatrix to IndexedRowMatrix
Key: SPARK-12869
URL: https://issues.apache.org/jira/browse/SPARK-12869
Project: Spark
Issue Type: Improvement
Components: MLlib
Reporter: Fokko Driesprong
In the current implementation of the BlockMatrix, the conversion to the
IndexedRowMatrix is done by converting it to a CoordinateMatrix first. This is
somewhat ok when the matrix is very sparse, but for dense matrices this is very
inefficient.
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