Profiling DMD's Compilation Time with dmdprof

[Manu]

On Thu, Nov 8, 2018 at 12:55 AM Joakim via Digitalmars-d-announce
<digitalmars-d-announce at puremagic.com> wrote:
>
> On Thursday, 8 November 2018 at 08:29:28 UTC, Manu wrote:
> > On Thu, Nov 8, 2018 at 12:10 AM Joakim via
> > Digitalmars-d-announce <digitalmars-d-announce at puremagic.com>
> > wrote:
> >>
> >> On Thursday, 8 November 2018 at 07:54:56 UTC, Manu wrote:
> >
> > I didn't configure the build infrastructure!
>
> Maybe you can? I have no experience with VS, but surely it has
> some equivalent of ninja -j5?

msbuild does parallel builds quite effectively. I expect it perceives
a dependency between jobs which cause it to serialise. Maybe there's a
legit dependency, or maybe the msbuild script has a problem? Either
way, it's not acceptable.
I would log this is maximum priority bug.
(https://issues.dlang.org/show_bug.cgi?id=19377)

> >> > And all builds are release builds... what good is a debug
> >> > build? DMD
> >> > is unbelievably slow in debug. If it wasn't already slow
> >> > enough... if
> >> > I try and build with a debug build, it takes closer to 5
> >> > minutes.
> >> >
> >> > I suspect one part of the problem is that DMD used to be
> >> > built with a C compiler, and now it's built with DMD... it
> >> > really should be built with LDC at least?
> >>
> >> Could be part of the problem on Windows, dunno.
> >
> > Well... ffs... people need to care about this! >_<
>
> I agree that the official release of DMD for Windows should be
> faster, and we should be building it with ldc... if that's the
> problem.

I think it's a combination of problems, and primary problem being
criminal negligence!