Re: master 2c79a8f 2/2: Use posix_spawn if possible.

[Eli Zaretskii <eliz@gnu.org>]

> Date: Tue, 2 Nov 2021 20:36:04 +0000
> From: Alan Third <alan@idiocy.org>
> Cc: p.stephani2@gmail.com, mituharu@math.s.chiba-u.ac.jp,
> 	emacs-devel@gnu.org
> 
> > > Is there anything we need to do to get scratch/posix-spawn-no-gnulib
> > > merged into master (or even emacs-28)?
> > 
> > Does it solve the problem?  And which builds does it affect?
> 
> As I understand it Yamamoto Mitsuharu has already merged it into the
> Mac port and I've seen it reported that the problems are solved with
> it.
> 
> I don't have a Mac with the latest macOS on to test it myself.
> 
> This is really only a problem on macOS, so we could limit the use of
> posix_spawn to Darwin builds.
> 
> I am concerned that there could be hidden issues with the branch since
> it doesn't seem to have had much testing, so it's probably best going
> into master, but I expect we'll see an increasing number of complaints
> about performance as more people switch to macOS 12. Perhaps we should
> keep it in mind as a possible update for 28.2, whenever that may be.

It is fine with me to merge this to master, as a macOS-only feature,
unless Philipp has reasons not to do that yet.  We can reconsider
backporting to emacs-28 at a later date, if and when we get enough
complaints.

Thanks.