in multiplication pharo is around 2 times slower compared to C++
#include <stdio.h>
int main()
{
double x=1;
for(double i; i<1000000000 ; ++i)
{
x = 0.1*i;
}
return 1;
}
time ./testMul
3.13 real 3.13 user 0.00 sys
time ./pharo Ephestos.image eval "|x| x := 1. 1 to: 1000000000 do:[:each| x
:= 0.1 * each]"
1
4.97 real 4.48 user 0.09 sys
On Sat, Dec 17, 2016 at 2:16 PM Dimitris Chloupis <kilon.al...@gmail.com>
wrote:
> So I was bored and decided to test how fast pharo is compared to C++.
>
> so I tested addition
>
> C++ version:
>
> #include <stdio.h>
>
> int main()
> {
> double x=0;
> while(x<1000000000)
> {
> x = x+1;
> }
>
> return 1;
> }
>
> time ./test1
> 2.84 real 2.84 user 0.00 sys
>
> Pharo version:
>
> time ./pharo Ephestos.image eval "|x| x := 0. 1 to: 1000000000 do:[:each|
> x := x +1]"
> 1
> 2.09 real 1.94 user 0.08 sys
>
> Pharo is +50% faster than C++ ... o_O ... that's suprising, I assume here
> Pharo VM probably does some kind of optimisation.
>
>
