Hi Deniz, If you time things in the global scope, you will come to incorrect conclusions about performance. If you want to do performance comparisons, you need to do them inside of a function body to get meaningful results.
— John On Nov 30, 2014, at 9:24 AM, Deniz Yuret <denizyu...@gmail.com> wrote: > I am trying to figure out the most efficient way to perform in-place array > operations in Julia. > > julia> a=rand(10000,10000) > > julia> tic(); b=sin(a); toc(); > elapsed time: 1.25738114 seconds > > julia> tic(); map!(sin,a); toc(); > elapsed time: 7.821650464 seconds > > julia> tic(); for i=1:length(a); a[i]=sin(a[i]); end; toc(); > elapsed time: 24.993171377 seconds > > Nothing seems faster than creating a new array, which I'd like to avoid > without slowing down the code if possible. > > Any ideas? >
