Misc questions:- licensing, VC++ IDE compatible, GPGPU, LTCG, QT, SDL

[retard]

Tue, 18 May 2010 12:13:02 -0700, Walter Bright wrote:

> %u wrote:
>> The DMC++ compiler you mentioned sounds interesting too. I'd like to
>> compare performance with that, the VC++ one, and the Intel compiler.
> 
> When comparing D performance with C++, it is best to compare compilers
> with the same back end, i.e.:
> 
>     dmd with dmc
>     gcc with gdc
>     lcc with ldc
> 
> This is because back ends can vary greatly in the code generated.

What if I'm using a clean room implementation of D with a custom backend 
and no accompanying C compiler, am I not allowed to compare the 
performance with anything?

When people compare C compilers, they usually use the latest Visual 
Studio, gcc, icc, and llvm versions -- i.e. C compilers from various 
vendors. Using the same logic one is not allowed to compare dmc against 
those since it would always lose.