[Bug 48668] New: rFactor2 - Physics thread slower on multiplayer mode

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48668

Bug ID: 48668
           Summary: rFactor2 - Physics thread slower on multiplayer mode
           Product: Wine
           Version: 5.0
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: Ubuntu

Created attachment 66525
  --> https://bugs.winehq.org/attachment.cgi?id=66525
Steam rfactor2 proton log

This bug is created after the one that exists in the Proton github issue
tracker

https://github.com/ValveSoftware/Proton/issues/245

The game runs fine in single player mode since version 4.11 to the newest
versions of Proton, but there is a problem in multiplayer mode that makes the
game run slower.

We have asked to the game devs in their discord server for some info, try to
get some logs of the multiplayer execution, and finally, one dev told us that
despite the graphics thread was fine, there is something wrong affecting to the
physics thread in the game, and this only happens in online races, so the issue
may be in the network code of Proton/Wine. (@leillo1975 tried to run the game
in vanilla Wine, and the problem was also there).

Is there any way to trace the network execution to find what could be the
problem?

I added a log file in the proton issue tracker generated running the game with
the "PROTON_LOG=1 %command%" but don't know if that contains enough
information.

Let me know if I can add any other info.

Thanks!