Bye bye, fast compilation times

[Jonathan M Davis]

On Wednesday, February 07, 2018 01:47:19 jmh530 via Digitalmars-d wrote:
> On Wednesday, 7 February 2018 at 01:20:04 UTC, H. S. Teoh wrote:
> > So I'd like to propose that we do something similar to what we
> > did with template instantiations a couple of years ago: make it
> > so that unittests are only instantiated if the module they
> > occur in is being compiled, otherwise ignore them (even in the
> > face of -unittest).  This way, adding unittests to Phobos won't
> > cause unintentional slowdowns / unittest bloat across *all* D
> > projects that import the affected Phobos modules. (Seen from
> > this angle, it's a pretty hefty cost.)
>
> Would it help to take the approach of mir, i.e. putting
> version(mir_test) before all the unittests?

It would, but if we have to do that in front of all unittest blocks in a
library, I think that that's a strong sign that the current design has a
serious problem that should be fixed if possible.

- Jonathan M Davis