Material Input Data and Efficiency

Development Rendering
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1

Regarding efficiency while making materials,

When using Input Data style nodes, like ‘VertextNormalWS’ or ‘Absolute World Position’; - or even potentially other types of output-only nodes like ‘LandscapeCoords’ - does it make a difference if you use more than one node, each time you need to use the data?

For example, is this

More efficient than this? (Assuming they were connected to a larger network, etc.)

Or is there simply no difference at all?

2

Would not make difference, because it passes several stages of optimization before it becomes actual shader, and in the case you posted above, there code will be the same.