Dmitriy Lyubimov created MAHOUT-1781: ----------------------------------------
Summary: Dense matrix view multiplication is 4x slower than non-view one Key: MAHOUT-1781 URL: https://issues.apache.org/jira/browse/MAHOUT-1781 Project: Mahout Issue Type: Improvement Affects Versions: 0.11.0 Reporter: Dmitriy Lyubimov Assignee: Dmitriy Lyubimov Priority: Critical if mxA and mxB are two in-core DenseMatrix matrices, then mxA(::,::) %*% mxB(::,::) takes 4x the time of mxA %*% mxB. possibly an issue of dot products on VectorViews vs. DenseVectors. dot product over DenseVectors seems to not to go through aggregate() cost-optimized framework. -- This message was sent by Atlassian JIRA (v6.3.4#6332)