[Bug 45815] New: FamiTracker etc. use much more CPU in Wine than Windows

https://bugs.winehq.org/show_bug.cgi?id=45815

Bug ID: 45815
           Summary: FamiTracker etc. use much more CPU in Wine than
                    Windows
           Product: Wine
           Version: 3.15
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Famitracker 0.4.6, 0CC-Famitracker 0.3.14.5, and j0CC 0.6.0a (forks of the same
MFC-based codebase) use around 60% of a single CPU core (with WINEDEBUG=-all)
when idling, and causes my laptop fan to spin up. It uses significantly less
than that when idling on Windows (16-32% of a core, corresponding to 4-8% of
four cores in taskmgr).

Famitracker: http://famitracker.com/files/FamiTracker-v0.4.6.zip

Tested on 3.14 and 3.15 and 3.15-staging, and in a clean WINEARCH-win32
wineprefix.