The other way to get round the issue is to load previous saves and try to perform another actions to change the data AI have to analyse. The Master of Orion franchise spawned a total of three games over a decade between the period of 19. For now the possibility of this issue is very low and the recommendations for its sollution are the same as for too long turn- smaller universe with less amount of players. Master of Orion was one of the original turn based strategy games and was a game of galactic proportions, choosing to use a space setting for its 4X style of gameplay. The reason for this issue is the same - AI have to work out to much of data to perform actions. In rare cases AI turns may not end at all. For example, smaller universe or less amount of players. If you have encountered this issue, we recommend to create new games with less scale. Performance of PC is very important in that case: better performance means faster calculation of data and less time for AI turns.
So the more data AI has to work out - more time will be needed to perform a turn. The main reason for it is that AI processes all the available data to perform the most usefull actions in game according to a situation. Some players may encounter an issue: in late game turns of computer players may become pretty long.