[Bug 53100] New: Euphoria: freezes every second while controllers are plugged in

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53100

Bug ID: 53100
           Summary: Euphoria: freezes every second while controllers are
                    plugged in
           Product: Wine
           Version: 7.10
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
   Regression SHA1: 4f1095a0ee4c7577e5287e56e388c36d0ba659ad
      Distribution: Gentoo

Created attachment 72531
  --> https://bugs.winehq.org/attachment.cgi?id=72531
Output of WINEDEBUG=trace+winmm wine euphoria.exe

If any controllers are plugged in, approximately every second Euphoria will
freeze for a brief moment.

Euphoria is a Visual Novel made by Clockup. Be warned, it's (very) NSFW. I'm
using the English release by MangaGamer: https://mangagamer.org/euphoria/ 
The problem affects other games by Clockup. They likely run on the same engine,
since the file structure is very similar.

This wasn't a problem with older versions of wine, git bisect points to
4f1095a0ee4c7577e5287e56e388c36d0ba659ad — winmm: Reimplement joystick APIs on
top of dinput, by Rémi Bernon.

Since this started after a winmm change, I ran the game with
WINEDEBUG=trace+winmm, the log is attached. Looks like find_joysticks is
regularly called, the game freezes at the same time these calls are logged.

My guess is that find_joysticks is slow for some reason, so it blocks the game.
The more controllers are plugged in simultaneously, the longer it freezes for
(I tested with 0, 1 and 4).

The game doesn't freeze on my Windows 10 install at all, even with 4
controllers plugged in.