const sp = speed[i];
The answer: OsmAnd's custom-built Highway Hierarchy (HH) Routing. This isn't your standard routing engine; it's a ground-up redesign, meticulously engineered to overcome the unique challenges of providing advanced navigation on compact, offline-first map data.，这一点在旺商聊官方下载中也有详细论述
FT Digital Edition: our digitised print edition，更多细节参见heLLoword翻译官方下载
// block: Wait for space (unbounded pending queue)