Airport Madness: World Edition (369290)

Airport Madness: World Edition (369290)

Environment:

Steam System information: steam system information gist
Proton version: Proton 3.7-4 Beta
Game: https://store.steampowered.com/app/369290/
Game version: 1.73
Game log whilst following steps to reproduce: steam-369290.log

Steps to reproduce:

1. Install game from the Steam client.
2. Start new game → Play →Zurich → Continuous Play → I want madness
3. Play the game, until around 400 planes have been handled.
4. The game’s frames per second starts to drop.
5. Exit the game normally.

Expected result:

The frames per second stay stable, even after lots of planes have been handled.

Actual result:

Game slows down after around 400 planes.

Discussion:

I think there is some kind of leak somewhere, which causes the game to slowdown over time. This is not a demanding game, so it should stay stable. I’m unsure of where the leak is, in the game itself or in Proton.

Begin with the linked steam-369290.log and the reproduction steps for Proton 3.7-4 Beta, then determine whether the slowdown is in Proton or the game. The issue provides no source file, test, or entry point; done would mean identifying and fixing the cause so frame rates remain stable after roughly 400 planes.