bug#41242: Port feature/native-comp to Windows

[Eli Zaretskii]

> From: Nicolas Bértolo <nicolasbertolo@gmail.com>
> Date: Wed, 13 May 2020 16:26:57 -0300
> 
> There are a few remaining issues:
> 
> * The loading process is very slow. This is especially annoying when coupled
>   with autoloading. For example, autoloading Helm may stall Emacs for 5 
> seconds
>   in my machine.
> 
>   I have thought a possible solution to this problem: load the byte-compiled
>   file and put the native-compiled version in a list. Then load that list one 
> by
>   one on an idle-timer, that way the UI freezes should be minimized. This 
> could
>   reuse the "late loading" machinery implemented for deferred compilation.

I believe we didn't investigate this issue well enough to understand
what happens and why.  Would it be possible to investigate this soon?
It could be after the patches are installed.

Thanks.