:1- Try to down the size of the map:
-if you down the size of the map before beginning a game you should try to follow this tip because more size more ram eating:
10-15 size is acceptable for play and you will se obviously what the map will generate more faster
30-45- Slow if you have poor resources in your pc when the map is generating
2- Less AI Players or Less Players:
If you use so many players on the game you will notice what the game will stuck a lot or maybe not if you have a good computer so if you put 10 or 15 will be acceptable, or less works obviously if you want
3- Down your Resolution
if you down a little your resolution the game should work more faster but maybe some other thinks will be not noticed on the game
4- Off animations on in-game options
in in-game options you will see options like graphics, fonts etc you will see some animations options on graphics
And thats all dudes i hope what this worked for you!!!!