Empty Scene Using alot of CPU why?

I totally emptied my scene even Main Camera why is unity still using 16% of my CPU?

I had a scene with lots of rays and stuff used 20% of my CPU I thought those stuff really drinks my CPU up witch seems not as it uses same as scene with only main camera

than I started to search where is the leak and I’ve found when I totally emptied it it’s in unity it self why?

well Main camera takes about 4% in empty scene as I’ve managed to get lower % of CPU is 16%

but when I’m not in play mode it uses only about 0-1% and that still has 2 cameras opened so actually kinda no difference

but why it takes 20%? ok camera is 4%, what’s the rest 16%?

I presume you are using the profiler? Remember, when using the profiler in the editor, alot of the consumed resources is taken from the editor itself. If you wish to know how much the unity project itself takes, make a development build and connect your profiler to it, and second, make sure you are looking at the “x ms” instead of the “x %” usage.