If you want to make good time on a long distance ride, it's helpful to pick either a maximally boneheaded simple route or a route that you know really well. Like, fifty miles up a highway, turn around and fifty miles back down. Otherwise you will be spending time squinting at a map and scratching your head that could be spent spinning away kms.

This may help not only your time but the overall feel of the ride. For me the zen of LD riding gets farked up when I have to stop and dig out my map.