This used to be an issue for me as well, but then I had a 300MHz laptop. I am now finishing my first game on a huge map with my new computer, and it's running very fast. Previous to buying my new box, I couldn't run bigger than a normal sized map all the way through to the end of a game. Wow ... this is such a different game in a way with all these civs competing at the same time. There is a bit of a hang between turns, but it's maybe five seconds, or ten if it's during war - can't be much longer than that, and even that's rather rare. This is after the AI has moved and animated and so forth, and while it is working ("waiting") for your turn to start. It's not like it's flying at that point, but it is a very short wait, considering. I have an AthlonXP 1700 with 265MB RAM and 64MB shared onboard SiS AGP video, and my mobo is a PCChips, which have improved quite a bit lately, although it's not a top of the line. The video is substantial for an onboard config, although the sound is lacking, but am going to add a better soundcard soon. So, I dunno, as my system isn't as fast as some others' who have been having problems with this, but it's a fast machine - it can handle nearly all new games well, including the 3D ones, and almost the only time it's an issue is with older games that designed for Glide that didn't port well to OpenGL, like Descent 3, sadly. Civ III is not such a game, however, and everything runs much more smoothly, including all the animations. There was one occasion, right at my entry into a major war, that caused a serious hang at the end of a turn for about two turns, and then everything was fine. I am guessing there must have been some serious churning going on right there, but it recovered soon. I must mention that I am running the DYP mod, so I am guessing that taxes it even more, with all the extra units and improvements. But before I couldn't even run DYP all the way through on my 300MHz with a regular map - it would get so slow as to be unplayable in modern times. However, I could run a normal game all the way through on a normal map with my laptop. I have PTW with the latest patch and Win98, and all my DirectX dirvers are updated.
Anyhoot, not sure how helpful this really is, but thought it would be worth putting it out there.
- krinklyfig
-- edit - well, it actually takes about 30 seconds now, but that's not too bad, and I'm up to the year 1975 with accelerated production and 16 civs starting out - there are still 13 left. I already won a diplomatic victory, and went back a turn and am now working on a different victory ... maybe the space race. Still, given that it's DYP and a huge map, I am impressed with 30 seconds between turns. I am still not at all sure why it would take ten times longer on machines that clock much faster, but it seems to work pretty well on mine. OK, I am knocking on wood ... don't wanna jinx it.