Yes good point. Pre-loading the full distance matrix is the right thing to do here. That's what we were doing at a startup as I was at a few years ago. GraphHop

Yes good point. Pre-loading the full distance matrix is the right thing to do here. That's what we were doing at a startup as I was at a few years ago. GraphHopper is quite expandable so it is nice to work with once you understand how it functions. But you definitely need to put your Java hat on :).