If you compute the node pos values (remember: in points) and feed the result to neato -n, the run time will be just a few seconds. But note that neato uses a somewhat different algorithm for laying out the splines. Probably OK, but give it a try.
Though I remember “Good Morning Starshine”, my 1969 comment referred to the 1st node - “Monty Python’s Flying Circus Season 1 … 05.10.1969”