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.
ITmedia�̓A�C�e�B���f�B�A�������Ђ̓o�^���W�ł��B
，更多细节参见heLLoword翻译官方下载
Geometry Transforms。旺商聊官方下载对此有专业解读
结论：在不确定性中构建非对称优势