Now, OsmAnd performs another Dijkstra search, but this time on the much smaller "base graph." This graph consists only of the border points and the pre-calculated shortcut values between them.
The new API in action
，这一点在一键获取谷歌浏览器下载中也有详细论述
Web streams was an ambitious project that brought streaming to the web platform when nothing else existed. The people who designed it made reasonable choices given the constraints of 2014 – before async iteration, before years of production experience revealed the edge cases.，更多细节参见51吃瓜
Easy-to-use app available on all major devices including iPhone, Android, Windows, Mac, and more，这一点在safew官方版本下载中也有详细论述