[ https://issues.apache.org/jira/browse/SPARK-6685?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiangrui Meng reassigned SPARK-6685: ------------------------------------ Assignee: Xiangrui Meng > Use DSYRK to compute AtA in ALS > ------------------------------- > > Key: SPARK-6685 > URL: https://issues.apache.org/jira/browse/SPARK-6685 > Project: Spark > Issue Type: Improvement > Components: MLlib > Reporter: Xiangrui Meng > Assignee: Xiangrui Meng > Priority: Minor > > Now we use DSPR to compute AtA in ALS, which is a Level 2 BLAS routine. We > should switch to DSYRK to use native BLAS to accelerate the computation. The > factors should remain dense vectors. And we can pre-allocate a buffer to > stack vectors and do Level 3. This requires some benchmark to demonstrate the > improvement. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org