Hi @sankhesh,
The shading is not enabled(if you are referrig to the property-shade) for my test before.
On the pc for test, the frame keeps about 25 (shown in the vtkFPSMonitor) when shading is disabled and jumps from 15-45 when shading is enabled.
In my tests this starts from the version 26.1.2, before this (26.1.1 or older) the frame keeps at 50+ while shading is disabled.
Regards.