Pretty cool script.
This purple group has the same output as the Python but isn’t elegant or fast…
DifferentialGrowths_2019Nov23a.gh (24.6 KB)
To see the Python at full speed, the purple group must be disabled.
Can’t be sure the output is identical because the pattern looks different each time it’s run?
P.S. This version (below) feels faster, approximately 1.5X the Python time?
DifferentialGrowths_2019Nov23b.gh (25.8 KB)
P.P.S. Version 3 (below) - faster yet?
DifferentialGrowths_2019Nov23c.gh (24.5 KB)