Turn off Cast /Receive Shadows?

Unity Engine
,
1

I know there’s no shadow in UI, but the mesh renderer for every object still has the ‘Cast and Receive’ shadows ticked on. Are these just dummy switches in iPhone, or is there any performance gain in turning off these options in the Mesh Render Inspector Window?

B.

2

the sending is a dummy switch.
the corresponding functionality only exists with Unity Pro on desktop.

the receiving is used for blob projectors normally I think, so this one might have an impact depending on the project

3

D.

That was speedy… thanks for the info.