topic no, this is not expected in Intel® oneAPI Math Kernel Library https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/dlange-is-twice-as-slow-as-dnrm2/m-p/1071676#M22294 <P>no, this is not expected behavior. is that hotspot for your application?</P> Sat, 10 Sep 2016 03:40:49 GMT Gennady_F_Intel 2016-09-10T03:40:49Z dlange is twice as slow as dnrm2 https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/dlange-is-twice-as-slow-as-dnrm2/m-p/1071675#M22293 <P>I was running some tests with dlange with the first argument 'F' (Frobenius norm) for 1000x1000 matrices and I noticed that it is twice as slower as using the same matrix (as a vector) with dnrm2.</P> <P>Is it expected? I use MKL 11.3.2.<BR /> &nbsp;</P> Fri, 09 Sep 2016 21:08:09 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/dlange-is-twice-as-slow-as-dnrm2/m-p/1071675#M22293 Zbigniew_L_ 2016-09-09T21:08:09Z no, this is not expected https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/dlange-is-twice-as-slow-as-dnrm2/m-p/1071676#M22294 <P>no, this is not expected behavior. is that hotspot for your application?</P> Sat, 10 Sep 2016 03:40:49 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/dlange-is-twice-as-slow-as-dnrm2/m-p/1071676#M22294 Gennady_F_Intel 2016-09-10T03:40:49Z Zbigniew, the problem is https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/dlange-is-twice-as-slow-as-dnrm2/m-p/1071677#M22295 <P>Zbigniew, the problem is fixed in 2017 u2. this update is released a &nbsp;few days ago. Could you check and keep us inform how this fix works on your side.</P> Mon, 27 Feb 2017 14:46:03 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/dlange-is-twice-as-slow-as-dnrm2/m-p/1071677#M22295 Gennady_F_Intel 2017-02-27T14:46:03Z