Quicksort superiority over Heap Sort

Question

Heap Sort has a worst case complexity of O(nlogn) while Quicksort has O(n^2). But emperical evidences say quicksort is superior. Why is that?

Answer 1

Average-case complexity, and the fact that you can take simple steps to minimize the risk of worst-case complexity in Quicksort (e.g. select the pivot as a median of three elements rather than a single selected position).