I would avoid that condition at all costs in GH. Too many of anything takes too long to compute, which is all the worse when building a model.
I see no indication of any effort or basis for choosing points or drawing a polygon between them. Nothing? So… nothing I can do either. Can’t read your mind and don’t want to do student homework anymore.
Assuming it takes you a quarter second to move the slider and visually inspect the result, and assuming you’ll have to -on average- search through half the list before you find the one you want, it will take you about 150 days of non-stop work.