Ok, OpenBLAS wasn't installed on this laptop, after installing Base.blas_vendor() changed. I'll repeat my tests in evening and port results.
On Thursday, July 17, 2014 5:47:44 PM UTC+3, Andrei Zh wrote: > > @Tim: seems like that - Base.blas_vendor() returns :unknown, while > Base.libblas_name equals "libblas.so.3". Is there a way to switch to > OpenBLAS? > > > On Thursday, July 17, 2014 5:21:24 PM UTC+3, Tim Holy wrote: >> >> I get this: >> >> julia> @time for i = 1:10 A*R end >> elapsed time: 7.428557846 seconds (320001120 bytes allocated, 1.43% gc >> time) >> >> julia> @time for i = 1:10 A*Z end >> elapsed time: 7.233144631 seconds (320001120 bytes allocated, 1.46% gc >> time) >> >> No difference. >> >> Are you using a different BLAS than OpenBLAS? >> >> --Tim >> >> On Thursday, July 17, 2014 07:16:46 AM Andrei Zh wrote: >> > Only 2 times faster. But for A = rand(2000, 1000); R = rand(1000, 2000) >> and >> > Z = zeros() we have: >> > >> > julia> @time for i=1:10 A * R end >> > elapsed time: 32.497353017 seconds (320001120 bytes allocated, 0.43% >> gc >> > time) >> > >> > julia> @time for i=1:10 A * Z end >> > elapsed time: 0.209265586 seconds (320001120 bytes allocated, 70.28% >> gc >> > time) >> > >> > 155 times faster! >> >>
