# that we get empty tables at the end.
total_places = self.TABLE_SIZE * self.TABLE_COUNT
+ # We use -1 as sentinel indicating an empty place, so that it has the
+ # same type as the rest of the data, rather than None, giving us large
+ # speeds up with a JIT (e.g. PyPy).
people.extend([-1] * (total_places - len(people)))