The purpose of D (GC rant, long)

[Walter Bright]

BCS wrote:
> How much does the runtime, generated code and Phobos depend on the GC?
> Does it try to optimize out allocations or delete things it can?
> For example, does this preform one allocation or several?

DMD isn't very good at eliminating unnecessary temporaries. This isn't a 
defect in D, but in DMD. DMC++ is pretty good at eliminating unnecessary 
temporaries, not because C++ is better, but because I put a lot of 
effort into that aspect (for example, mine was the first to do the 
"named return value" optimization).