Sorting waypoints for faster routes

I am a salesman. I drive to many destinations daily. Not one or two, but fifty or more each day. I visit shops, sell my goods and earn a living from it. Of course I know how to drive the fastest route. The optimal order of stops comes naturally. Some mathematical scientists have spent their life on the so called travelling salesman problem. They call it a hard problem. But it is no problem for me. It's damn easy. You put all addresses in a big hat and pull one out after each other. Then you sort them on the zip code. In reverse that is. After that shuffle them twice and throw them in the air. Your cat (black preferably) will then pinpoint the fastest trip. Too much hassle? Even more efficient is to use this routeplanner for multiple destinations that sorts waypoints in the optimal order.