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Running game such as Overwatch and Minecraft(heavy modded) run perfectly fine at 240Hz with my monitor, but other software such as Firefox run at a extremely slow refresh rate with tearing. When these heavy applications are closed, everything works as expected at 240Hz. Im using I3wm on Arch Linux with Xorg and an NVIDIA card with NVIDIA's closed source drivers.
I know Xorg is very bloated, but surely I shouldn't get this level of poor performance, especially with system resources available.
My question is how do I solve this? How do I get smooth framerates accross all applications, or at the least, give each application equal GPU/CPU priority to even out the framerates? My CPU is nowhere near 100% usage, and same with the GPU and even memory.