Since 41.40 I get similar performance issues as Nativel does.
I've created fresh "a really CDDA" game walked to the main road and at crowded areas I get those freezes with weird pose rotations. I've captured a short video of those freezes.
Hope you guys will solve that issue since its kinda makes the game unplayable, losing a character because of performance issue may be frustrating and disappointing.
My pc setup:
i7 3770 / gtx 1070 / 32 ddr3 / win 10