hi.
adjusting graphics via toolbar has no effect on the output file.
as an experience using precomputed visibility can improve frame rate up to 20 frame. I think you have not enabled it yet. you can go to projects setting > rendering> warn about no precomputed visibility and enable that . that warns you if it is not enabled.
launch your game on your device and use console on four finger tap
then type stat engine
from there you can see the expensive processes