How to check if inputs have changed since last Circuit::Tick() ?

[nyue]

In the method

void SomeClass::Process_( SignalBus const& inputs, SignalBus& outputs )

is there a way to determine if the inputs have change since the last call to ::Tick() or within the ::Process_() call.
I am looking for a way to avoid doing any computation and updating outputs if the inputs have not change.

Cheers