Mages of Mystraila (529660)

Whitelist Request

• Name of the game to be whitelisted: Mages of Mystraila
• Steam AppID of the game: 529660

System Information

• GPU: GTX 1070
• Driver/LLVM version: 396.54.09
• Kernel version: 4.15
• Link to full system information report as Gist: https://gist.github.com/d10sfan/cd6abd90b2f5c549f350b9b878c9d300
• Proton version: 3.16

I confirm:

• that pressing the Play button in the Steam client is sufficient.
• that runtime config options
  are necessary to run the game.
• that no workarounds other than the mentioned ones are necessary.

Issues

• I haven't experienced any issues.
• There are no issues left open for this game.
• Although I consider the gaming experience equal to Windows there are
  remaining issues:

It seems that to get consistent performance, it's required to turn off vsync. With vsync on, the game will stutter and go down to around 40 fps. If you disable it in-game, it'll stay pretty consistent.

No source files or tests are identified. Start by reproducing Steam AppID 529660 with Proton 3.16, comparing in-game vsync enabled and disabled on the reported system, then document whether the stutter and performance drop remain and what change would address them.