Matthias Boehm created SYSTEMML-2161: ----------------------------------------
Summary: Suboptimal codegen plans for ALS due to wrong cost model memoization Key: SYSTEMML-2161 URL: https://issues.apache.org/jira/browse/SYSTEMML-2161 Project: SystemML Issue Type: Bug Reporter: Matthias Boehm Due to a change from 1 to 0-based ID sequences in SystemML, there is a codegen cost model memoization issue for special cases of the first cost vector per optimization problem. For ALS-CG over amazon this has severe performance implications causing a slowdown of more than 2x. -- This message was sent by Atlassian JIRA (v7.6.3#76005)