Pathfinder: Kingmaker has this realllllllllllllllllly annoying save system (it just dumps Unity components from a scene into a Json and each zone has persistence so these Jsons stay large forever). This is a little (and very hastily put together) bash script to find which zones are creating the most trouble

pfkm_large_zone_finder.sh

# NEEDS jq installed
# sorry for how lazy this is
# run this inside an uncompressed save file directory (you know, the one with dozens of json files and png fog of war masks)
# this will help you find which are the zones causing the most save lag
# run this, install UMM + Cleaner (and NoHistory to be extra clean) mods and travel to largest zones and run the "Clean" option provided
# by the Cleaner mod
echo > zones.txt; for f in *.json; do s=`stat -c "%s %n" "$f"`; j=`jq '.m_MainState.SceneName' "$f"`; echo $s $j >> zones.txt; done; sort -n --reverse zones.txt > zones_sorted.txt;

# output is:
# sizeinbytes filename zonename
# zonename can be null, in which case ignore it
# if a zonename has 'outdoors' in it, that either means its an actual zone or an overworld e.g. `BrevoyBorderlandsOutdoorBase_Mechanics`

# I've knocked a few seconds off each save and dropped the compressed size down from 28MB to 22MB. 
# I hope when I get around to PF:WotR the save system will either be better or Cleaner will be working nicely for it