figuring out performance issues on Linux

Some of my players report bad performance on Linux (https://steamcommunity.com/app/523070/discussions/0/3112543466380908203/)

I unfortunately don't have a Linux machine to test myself, so I can't do things like running the profiler in the editor. I know from their answers that the game already has bad FPS in the main menu, which has no 3D models, lights, shadows or whatever, only a GUI Canvas with some elements. Frankly speaking, I have no clue what could possibly cause low FPS there, the scene would probably run at 1000 FPS if I didn't cap FPS to 60.

I'll be thankful for any advise on where to look or how to figure out what the issue is.

I'm building the binaries with 2021.2 beta 15

 

The game runs fine on my Ryzen 3 2200G, just ignore some background open apps https://prnt.sc/1zhyqxr
It hurts me to say but, although perhaps some micro optimization can be done, i believe that their computers aren't able to run the game well.

 

Thanks for the test. I've since done some optimizations that might have caused their issues, and I'm mostly out of ideas what else to make faster (except things with small gains).

 

Which Windows machine? ;-)

I'm a Mac developer. I could potentially set up a Linux on a bootcamp partition, but it's going to be tricky. If my game sells a few copies, I might buy a cheap desktop PC and put Windows and Linux on it, for testing.