top time wasters in DMD, as reported by gprof

[dennis luehring]

Am 24.06.2013 16:52, schrieb Martin Nowak:
> For some reason gprof nerver terminates on my system. So here is the
> same data recorded with oprofile's operf. It also includes kernel, libc
> and ld figures.
>
> http://codepad.org/zL3C6eQd
>
> whole phobos as shared library with unittests and BUILD=debug
> http://codepad.org/lITSMbhD
>
> BUILD=release didn't compile with some error about .offsetof

what is the sense of doing profiling in BUILD=debug? or is the optimizer 
still active?