Re: scratch/igc: Implications of MPS being asynchronous

[Eli Zaretskii]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: stefankangas@gmail.com,  pipcet@protonmail.com,  emacs-devel@gnu.org,
>   gerd@gnu.org,  eller.helmut@gmail.com
> Date: Mon, 13 Jan 2025 14:33:41 +0100
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> igc_on_idle
> >
> > Thanks, but that doesn't seem to call compact_font_caches?  Is there a
> > reason not to do that?
> 
> Not that I remember. Could be an oversight.

I now see this comment in compact_font_caches:

  compact_font_caches (void)
  {
    // Cannot be done with MPS, which doesn't seem to be tragic
    // because there is an option to turn it off.
  # ifndef HAVE_MPS

Why cannot font caches be compacted with MPS?