I'm not aware of any information that's not in the help file -
"The number of nodes includes functions, such as Add and Subtract; subVI calls; structures; terminals for front panel objects; constants; global and local variables; and Property Nodes.
Notice that for Property Nodes, reading multiple properties with the same node counts as one node. You can select the User Interface Metrics option to determine the total number of properties a VI reads or writes.
The number of nodes does not include wires, tunnels, or objects that are subcomponents of structures, such as the loop iteration count of a For Loop or a sequence of local variables. "
