Had my first game crash with an Out of Memory error. I played the Campaign and a normal Random Map game with no slowdown like the one I got this time (did have a crash the first time I loaded it up, but no others I believe...). I was playing on the Middle Earth map provided in the in-game Mods section, and it was taking a long time for the next turn to start after pressing End Turn.
http://pastebin.ca/1925791
Thank you for your help.