Is the Fade Node optimised to only use/calculate an input if it is used for the output?

[Mr-Lime-404]

What I mean by that if the Fade Input, which controlls how much of each input to put into the output, is >= 1 or <= -1,
does it still do the calculations to get the value of input A (which is only used for Fade-Values between -1 and 1)
or does it know to skip these calculations as they are not necessary for the output?

(Same goes for if the Fade-Value is 0 and Input B)

That basically determines, if I need to make multiple noise-functions and blend them myself or if I can just use one giant function (which would be more efficient and fancy I guess xD)