// (it isn't always in every impl)
OsmAnd identifies the clusters containing your start and target points.
，详情可参考Line官方版本下载
Area Clusters: The map is intelligently segmented into numerous small regions or clusters.，推荐阅读雷电模拟器官方版本下载获取更多信息
It is worth mentioning that the C library malloc might be using and caching