[Bug 40841] New: Steam game Minus Zero has bad performance

https://bugs.winehq.org/show_bug.cgi?id=40841

Bug ID: 40841
           Summary: Steam game Minus Zero has bad performance
           Product: Wine
           Version: 1.9.12
          Hardware: x86
                OS: Mac OS X
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]

Created attachment 54822
  --> https://bugs.winehq.org/attachment.cgi?id=54822
Console output

The game 'Minus Zero' which is a simple lock-on shooter game, has bad
performance degradation in some spots. The one consistently reproducible
problem occurs when there is very little on screen. Game drops to 30fps, maybe
even lower. Under windows (even under vmware fusion) game maintains a solid
60fps.

I've noticed that even in the menus it never seems to hit a consistent 60fps,
it's always around 56-58fps.

Things I've tried, none of which helped:

disabled glsl
set 'skip single buffer flushes' to true
latest staging
disabled steam overlay

I've also verified the issue is present when running on linux.