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The original was posted on /r/linux_gaming by /u/Impossible_Arrival21 on 2023-09-01 01:04:37+00:00.

I have a more than capable computer for running gmod very well. i5-13600k and rx 6800 (better than a 3070). I am using the x64 beta with the CEF patch. I have only around 10 addons, all of them are trusted.

Here are the two problems:

When I join a certain multiplayer server, I get around 250-400 fps. Runs perfectly fine. When a certain player joins the game, the CPU shoots up to 100% and the fps goes down to anywhere from (on average) 20-45 fps and can occasionally reach 9 or lower with extreme stuttering. I have no idea what is causing this. No, it isn’t PAC, because disabling it does nothing. Sometimes, if I rejoin the server while they are still there, the fps is around 120, which is closer to normal, but I think it drops back into the stuttery mess later.

The second problem isn’t really horrible but it is concerning. When I join a singleplayer gm_construct game AFTER LAUNCHING THE GAME FOR THE FIRST TIME SINCE THE LAST REBOOT, I get around 900 fps looking straight ahead, and can reach 1500 fps when looking into the sky. If I join a server and restart gmod, or just restart gmod sometimes, that fps can go down to 300-500 (800 when looking at the sky). In gm_bigcity, my fps stays the same at around 850-1000 fps. Why is my fps cut in half in gm_construct after restarting gmod (or joining a server and restarting)?

Also, when the fps is extremely low when the person is in the server with me, trying to close the game or disconnect from the server just freezes the game and I have to force kill the process to end the game.