i think maybe it's related to m1.large, because i also tested on my laptop, the two case cost nearly the same amount of time.
my laptop: model name : Intel(R) Core(TM) i5-3380M CPU @ 2.90GHz cpu MHz : 2893.549 os: Linux ubuntu 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux -- View this message in context: http://apache-spark-user-list.1001560.n3.nabble.com/breeze-DGEMM-slow-in-spark-tp5950p5971.html Sent from the Apache Spark User List mailing list archive at Nabble.com.
