[ https://issues.apache.org/jira/browse/SPARK-4611?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiangrui Meng resolved SPARK-4611. ---------------------------------- Resolution: Fixed Fix Version/s: 1.2.0 Issue resolved by pull request 3462 [https://github.com/apache/spark/pull/3462] > Implement the efficient vector norm > ----------------------------------- > > Key: SPARK-4611 > URL: https://issues.apache.org/jira/browse/SPARK-4611 > Project: Spark > Issue Type: Improvement > Components: MLlib > Reporter: DB Tsai > Assignee: DB Tsai > Fix For: 1.2.0 > > > The vector norm in breeze is implemented by `activeIterator` which is known > to be very slow. In this PR, an efficient vector norm is implemented, and > with this API, `Normalizer` has huge performance gain. > Here is the benchmark against mnist8m dataset. > Before > DenseVector: 68.25secs > SparseVector: 17.01secs > With this PR > DenseVector: 12.71secs > SparseVector: 2.73secs -- 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