In my latest game, I'm playing on a standard size map and has established several cities that grow pretty fast; but the production speed is awful! Some 4 or 6 size pop cities takes like 30 turns to make a swordman!!! I've tried to give every city at least 5 squares space between each other, and irritigates (spelling?) only grasslands (except some exceptions off course ). I've got some mines, but it still has lousy production speed. Regular build order so far: Worker -> Worker -> [Military unit] -> Temple -> Marketplace -> Granary. Any tips on how to improve?