Backend nearly entirely converted to D

[Dukc]

On Wednesday, 7 November 2018 at 08:31:21 UTC, Joakim wrote:
> I just benchmarked building the last couple versions of DMD, 
> when most of the backend was converted to D, by building them 
> with the latest DMD 2.083.0 official release and clang 6.0 in a 
> single-core linux/x64 VPS. Here are the times I got, best of 3 
> runs for each:
>
> 2.081.2 - 11.5s
> 2.082.1 - 10.5s
> 2.083.0 - 9.9s
> master  - 10.8s
>
> Not quite the gains hoped for, particularly with those last 
> large files you just converted to D seemingly slowing 
> compilation down

Could this be because you used a LLVM compiler for the C code but 
a Mars compiler for D code? If one either uses DMC for C or LDC 
for D, perhaps the results will be better.