I'm about to start an application that will need a simple distance query to order results. After some search I've discovered some functions that seems to do this work pretty easily without needing PostGIS, what seems to be too much for my task.
My question is: what would be better from a performance point of view, using a POINT datatype to store lat/long or two DOUBLE fields, separately? Would they have any difference?
Bonus question: is the approach from that link a nice idea indeed?