Personally, I just read for 10 minutes then and finish the rest later. I do the same with books.

Interesting. Are you on Wayland? It supposedly is to offload GPU tasks from the CPU to the GPU.

“Some GPUs include a GPU System Processor (GSP) which can be used to offload GPU initialization and management tasks.” https://download.nvidia.com/XFree86/Linux-x86_64/510.39.01/README/gsp.html