Moving around after 100 it takes longer to to do the next 10 turns as it did to get up to the first 100 turns.
This is why I stopped playing, I feel there is something broken here, a loop that should not be happening or some such, It has only started happening for me after the 3.0 patch. I recently built a new computer, 2700x, and I still get the same slow down as I do on my other outdated rig, Athlon 8350, both with 32gb of RAM.
There are a lot of others with high end rigs complaining of the same over on the steam forum, although of late everyone has fallen quite, most likely due to no longer playing the game like myself. They all get the typical support answer, check our troubleshooting faq etc, when a member of SD replies that is.