Heavy stutter with Lots More Settlers and Enemies mod installed

[assassin394]

I'm getting heavy stuttering when LMSE mod is installed. The fps will drop from 60 to 1fps in few secs then go back up to 60. It happed more frequently around dense area like boston city. Rarely happen in interior cell. I don't really want give up this mod. Anyone else able to use LMSE without stutter?

my specs: i3 9100f, 16GB ram, rx 580. The game is installed on SSD