fps goes down when moving the camera

i have this weird issue when i try to move the camera with RigidbodyFirstPersonController script,
when i stand still my fps is 120 but when i move the camera or the player it goes to 60-80 fps

and in the profiler the script usage goes high when moving too.

this is my first time asking a question in this forum, sorry for my bad english.

It’s pretty normal that your fps drops on camera movement. Unity has to redraw the whole screen, collect objects to draw, do culling, calculate a crowd of things so it’s normal. When you stand in place and don’t move anything not even the camera the fps is likely to stay still (except a few changes, but that should be about a few fps) .