While we're at it, anybody experiences really slow performances with EU:III?

I for some reason was able to play it for a whole afternoon (vanilla 1.3, NA 2.2 and IN 3.1). Then I tried to install MM, just to give it a shot (don't think I could have handled everything immediatly, but heh), and the game turned into a slug fest.

I got rid of MM, which did not improve anything, so I uninstalled the game and the 2 expansions, reinstalled them, and here am I, wondering why the game is so slow although it worked perfectly fine yesterday.