Minimize GC memory footprint

[Mike Parker]

On Saturday, 6 February 2021 at 17:50:18 UTC, frame wrote:
> On Saturday, 6 February 2021 at 15:45:47 UTC, rikki cattermole 
> wrote:

>
> Default settings should work out of the box. If not - it's bad 
> for reputation of the language.

Given that 32-bit has been the default on Windows for D's entire 
lifetime, I don't expect this is so common of an issue. More 
harmful would be requiring Visual Studio to compile with the 
default settings.

That said, dub already uses -m64 by default on Windows. And the 
goal is to enable 64-bit in dmd on Windows by default. That's the 
reason the MinGW-based link libraries and the LDC linker were 
added to the distribution, so that it will work out of the box. I 
don't know what the timetable is supposed to be, but at some 
point after that is rock solid, the switch to 64-bit by default 
will be made.