Ah ok I see then, sorryt for the weird question haha...
Btw, yes, mainly it's due to the total amount of scripted monitors and historic events which trigger any turn...
Try as well to install Large Adress Aware, it's an application which forces the MII engine to run using an extra space of RAM (MII is set for usage of single core being an old game, hence LAA forces it to use that core fully)... it can help too for speeding up..
https://helloacm.com/large-address-aware/