[Bug 47413] New: wineserver and/ or winedevice rescan all installed fonts on every application start

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=47413

            Bug ID: 47413
           Summary: wineserver and/or winedevice rescan all installed
                    fonts on every application start
           Product: Wine
           Version: 4.8
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: asmqb7 at gmail.com
      Distribution: ---

When running any application, including for example something as simple as
"wine notepad", there is a delay of up to 30-45 seconds before Wine actually
starts thinking about the application I want to run (and windows appear on the
screen etc).

strace shows that this is because winemenubuilder and/or winedevice are
reanalyzing all fonts in /usr/share/fonts by opening each font in turn.

This is on reasonably-up-to-date Arch, and has persisted since the first time I
ran Wine on this installation quite a few months ago. I've not fiddled with
anything fontconfig-related.

No other application on my system does this. Starting `leafpad`, I see that the
configuration in /etc/fonts/conf.d/ is loaded, followed by a very fast
recursive scan of /usr/share/fonts/ (in which no files are opened) intermixed
with loading of files in /var/cache/fontconfig/*cache-7.

I'm not sure how to figure out if this is a wine-specific problem or a system
configuration problem.

I thought `strace -s999 -f wine notepad` might be the most useful artifact I
could provide at this point - but I didn't expect 516MB of output :). It's only
20MB xz-compressed, though, so I am happy to fiddle with `split` and add the
resulting ~two attachments, but I am definitely asking first before I do that.

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