In that sense nothing is faster than Dijkstra's. There are problems for which A* heuristic fails completely, and Dijkstra's is better. JPS exploits a more speci

In that sense nothing is faster than Dijkstra's. There are problems for which A* heuristic fails completely, and Dijkstra's is better. JPS exploits a more specific structure of pathfinding just like A* exploits structure given by an heuristic. We have to be very careful to the setting when we say something is 'optimal'.