Niterux

It wont let me download it at all on Thorium web browser :(  or on firefox web browser 

Preload maps disable main menu music. It sounds like you have it enabled from you describing hiccup music.

My CPU is AMD Ryzen 7 5700X 8-Core Processor and my GPU is NVIDIA GeForce RTX 3060. I'm measuring latency using the NVIDIA overlay. I can't get a screenshot of...

https://github.com/user-attachments/assets/a5b9ea80-1cc2-4433-b254-b6ac42173484

Disabling vsync seems to stop alt tabbing from increasing the latency but switching from full screen to windowed and back does not. Also I have triple buffering set to off...

No.

Yeah a few, but disabling all of them doesn't fix it

The aforementioned spew bug is https://github.com/ValveSoftware/Source-1-Games/issues/1985

Are you sure they have the same goal? Async mod seems to have the goal of giving entities separate threads while WorldThreader seems to have the goal of giving _dimensions_...

failtroll.