How to size optimize the executable?

[Claus D. Volko]

What bothers me about D is that the executables dmd generates are quite large. Some simple programs have almost 200 kb. I've tried packing them with kkrunchy, the result are still about 100 kb. By contrast, with Visual C++ such programs would be only a few kbytes (in release mode). Why is D generating such big executables? How is it possible to get them smaller?