In T95600#1303770, @Jeroen Bakker (jbakker) wrote:

I suspect D10390: EEVEE: Refactor closure_lit_lib.glsl. Sometimes tradeoff have to be made in terms between maintainability and platform performance. In blender we try to optimize for newer platforms. Older platforms can become slower as their drivers don't receive the optimizations we are targeting (responsibility of the OS driver developer). If the closure lit refactor is the root cause fixing this would slow down other platforms as that was the goal of the task.

The good news is that T93220: EEVEE rewrite will be improved compilation times.

few more things that came to my mind:

1. if you're surprised my desktop wallpaper changed - I just have automatically changing wallpaper every few minutes. the video is uncut.
2. this file was created in 3.0.1, but the issue is the same with files that I previously created in 2.83.x
3. render single frame time jumped from 4-5s (2.83.19) to 11-12s (3.0.1)

Hi, I have the very same issue as OP and the very same version of the system, however I use Blender 3.0.0 and work on MacBook Pro (13-inch, 2016, Four Thunderbolt 3 Ports) with external Display