While tempered by the performance, this is a pretty well made race sim that is a mix of high control half-tune-half-race games and regular 2D arcade racers, great job!
thanks! i'm really glad the tuning and the simulation (and of course the racing) felt enjoyable! could you tell me which platform you played, your GPU/CPU, resolution, and whether it was low FPS overall, or occasional stutter? was it while racing the AI with many bots? you see, every AI opponent uses the same complex physics computation as yourself, which means a 60Hz physics tick for the vehicle dynamics, and a 960Hz for the tire model. that could add up. it's an early alpha, and i haven't done much optimization yet, so this information would be helpful to me
Low FPS, worsened by bots and the larger area but generally under 15.
I wouldn't say it's CPU side though, I'd recommend running through everything that could be in the physics buffer and disabling it until you notice a larger drop.
(also if it is, 60 HZ seems a bit much, and the effects won't be much different from 30 or 20)
it would help me tremendously if you could tell me your GPU, especially since you also said you don't think it's a CPU issue. i have an office grade laptop with an integrated graphics card, and i get steady 60FPS, so it could well be a GPU/driver quirk or Godot simply choosing the wrong GPU on your system. if you are on windows, there is a %APPDATA%\Godot\app_userdata\Kraft\logs\godot.log file which says what GPU the game selected on startup.