serious slowdowns on some maps

[francoisD]

hi

in the middle of ma long campain as a german player, i am now encountering some delay-type battles. the ai has roughly 450 units and i am playing on 140*140 hex maps.
so far i never encountered delays when playing, except from time to time a few minutes when the ai was playing, perhaps at key points during the battles.

but in the current one, i am waiting half an hour each turns. the only difference with the previous maps is that this one is almost entirely covered by trees.

is it normal? should i expect the same slowdowns in towns or in other maps?

thanks!