DMD compilation speed

[Martin Nowak via Digitalmars-d]

On 03/31/2015 05:51 AM, deadalnix wrote:
> Yes, compiler to perform significantly better with GC than with other
> memory management strategy. Ironically, I think that weighted a bit too
> much in favor of GC for language design in the general case.

Why? Compilers use a lot of long-lived data structures (AST, metadata)
which is particularly bad for a conservative GC.
Any evidence to the contrary?