The last element is ours.
With a thousand points, you barely notice the delay. With a million, you're doing a million distance calculations for every single query. On a phone updating the map as the user scrolls, that's untenable.
，这一点在同城约会中也有详细论述
Мерц резко сменил риторику во время встречи в Китае09:25
unsigned long long length;