[Mono-list] Re: Time problems on Mono

[Gregory Bowyer]

Martin Hansen wrote:
>>Yes, you can submit a test case that shows we're slow, 
>>so we can check and fix it.
> 
> I made some speed tests too and found mono to be slower.
> If you have some sample programs that run faster on mono I would be interested.
> 
> My test was simple:
> // project created on 8/16/2004 at 4:00 PM
> using System;
> 
> class MainClass
> {
> 	public static void Main(string[] args)
> 	{
> 	   double sum=0;
>   		for ( int m=0;m<9;m++){
>   			for ( int n=0; n<=(1000* 1000 * 1000) ;n+=1 )
>   	  		{
> 				sum *= 1.0;
> 			}
> 		}
>   	}
> }
> 
> 
> The results was
> Under .net 6 secs. Under mono 9 secs, adding --optimize=all did not make a big difference.
> The same program in c++ compiled by g++ -O3 is also about 6 secs.
> 
> But the most peculiar thing is that sometimes when compiled by mcs it takes mono above 2 minutes to finish, I have not found the differencing factor yet.
> 
Not meaning to flame but isn't that test a bit of a no brainer for 
performance issues, I mean its simply an aggressive loop that will take 
any langugage / platform a while to work through