Profiling DMD's Compilation Time with dmdprof

[Vladimir Panteleev]

On Thursday, 8 November 2018 at 04:16:44 UTC, Manu wrote:
> ...what!? DMD takes me... (compiling) ... 1 minute 40 seconds 
> to build! And because DMD does all-files-at-once compilation, 
> rather than separate compilation for each source file, whenever 
> you change just one line in one file, you incur that entire 
> build time, every time, because it can't just rebuild the one 
> source file that changed. You also can't do multi-processor 
> builds with all-in-one build strategies.
>
> 4 seconds? That's just untrue. D is actually kinda slow these 
> days... In my experience it's slower than modern C++ compilers 
> by quite a lot.

It was definitely about 4 seconds not too long ago, a few years 
at most.

It does seem to take more time now; I wonder why.