Out of curiosity, I tried the following one (on julia 0.4-rc1) f(x) = ( c = cos(x); c^3 ) f_float(x) = ( c = cos(x); c^3.0 )
then I get 0.006489 seconds 0.013220 seconds but with the original code, I get 0.076714 seconds 0.013280 seconds (both without @fastmath)
