Except here... support.screeps.com/hc/communities/public/questions/…

Also pushed my priorityStack implementation... Not sure how much it is faster than heap.js (in the worst case it might have a slower sort)

I'm too lazy to benchmark, though I can observe that it will probably do less

github.com/avdg/screeps/commit/… vs github.com/qiao/heap.js/blob/…