What causes late game turns to load longer?

[Frossa]

Civilization V is the most fun in the middle to the late game. But it is also around that time (usually around the end of the Renaissance) that the games start to take ages for each turn to load. Is this due to high activity among units, too many civilizations, or a result of playing on huge maps?
Does anybody know or have any speculations to how to decrease loading times?

 

[Heerlo]

It's probably like you said. On huge maps in the late game there's more units, and just more things the AI has to do. It might help to play on smaller maps with less civilizations, but if you're like me, you don't like the trade-off.

 

[Frossa]

It's probably like you said. On huge maps in the late game there's more units, and just more things the AI has to do. It might help to play on smaller maps with less civilizations, but if you're like me, you don't like the trade-off.

Okay, thanks.

 

[TheMarshmallowBear]

Aaaaaaairplanes...

 

[Heerlo]

Aaaaaaairplanes...