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@puremagic.com>
wrote:
On Thursday, 8 November 2018 at 07:54:56 UTC, Manu wrote:
> On Wed, Nov 7, 2018 at 10:30 PM Vladimir Panteleev via
> Digitalmars-d-announce
> <digitalmars-d-announce@puremagic.com> wrote:
>>
>> On Thursday, 8 November 2018 at 06:08:20 UTC, Vladimir
>> Panteleev wrote:
>> > It was definitely about 4 seconds not too long ago, a few
>> > years at most.
>>
>> No, it's still 4 seconds.
>>
>> digger --offline --config-file=/dev/null -j auto -c
>> local.cache=none build 7.31s user 1.51s system 203% cpu
>> 4.340 total
>>
>> > It does seem to take more time now; I wonder why.
>>
>> If it takes longer, then it's probably because it's being
>> built in one CPU core, or in the release build.
>
> https://youtu.be/msWuRlD3zy0
Lol, I saw that link and figured it was either some comedy
video, like the Python ones Walter sometimes posts, or you
were actually showing us how long it takes. Pretty funny to
see the latter.
It's not so funny when every one-line tweak burns 2 minutes of
my life away.
I was laughing that you actually proved your point with direct
video evidence, obviously it's sad that it takes so long.
> DMD only builds with one core, since it builds altogether.
Yes, but your build time is unusually long even with one core.
Are the D backend and frontend at least built in parallel to
each other?
That doesn't matter, you can clearly see the backend built in
less than 2 seconds.
The C/C++ files in the beginning are built very fast, but the D
files in the backend appear to take much longer, kicking in at
1:18 of your video and then the next compilation step starts at
1:40.
I suspect part of the problem is that your build is being done
completely serially, even for separate compilation. I have no
experience with VS, so I don't know why that is.
It doesn't seem to be even doing that, though they're separate
invocations of DMD.
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?
> 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.
