Update on the D-to-Jai guy: We have real problems with the language

[rikki cattermole]

Today I got some timings after (some how?) fixing dmd builds for my code.

1) ldc is ~45s
2) ldc --link-internally is ~30s
3) dmd is ~16s

Note it takes about ~3s to ``dub run dub@~master -- build`` due to 
needing latest.

So what is interesting about this is MSVC link is taking about ~15s by 
itself, LLVM is 15s which means that the frontend is actually taking 
only like 1s at most.

Pretty rough estimates, but all my attempts to speed up my codebase had 
very little effect as it turns out (including removing hasUDA!).