Hello, I usually don't post on these Forums, I'm lazy and just float around the STEAM FORUMS or Reddit! Anyways I just wanted to point out a common trend lately that involves one of the MOST USED mods - Geometric Placement.
I thought it was a hoax awhile back when players were saying that they were getting lag spikes, and then it finally happened to me on an extended playthrough (day 300 atm).
Lag spikes are potentially from;
1. Hovering items on hotbar
2. Rain
3. Geometric Placement on a higher refresh rate
Lag fixed for now by putting Geometric Placement on 10%
Keep in mind I've used this mod for ages, and just only the past couple of months have I had to even touch the settings in this mod!