What happened to phobos compile time?

[Seb]

On Tuesday, 4 August 2020 at 05:27:36 UTC, RazvanN wrote:
>
> I'm curios if there's actually a provable runtime benefit, 
> otherwise the performance regression is unacceptable.

It doesn't even matter whether there's a provable runtime benefit 
as no one seriously uses DMD for performance-related tasks. There 
was a recent internal discussion and everyone on the D dev team 
(except Walter) agreed that it's smarter to use an optimizer with 
much more stakeholders than to divert D's small development 
capacities into a self-maintained optimizer.

Team Phobos for a long time now doesn't even benchmark Phobos 
functions with DMD, but LDC only. In other words: Phobos does not 
cater anymore for the shortcomings of DMD's optimizer and I don't 
see any reason why it should.

So this PR should have never been merged and should be reverted 
immediately.