Had 59-60 UPS before loading the mod. Loaded the mod, let it do its thing, but ultimately didn't like it. Removed the mod but my save still drops down to sub-6 UPS after loading the game.

This my 75-hour save game :( I've tried all kinds of ways of trying to reload the game and the issue won't fix itself. Even the mod which deletes unseen chunks causes my game to crash after an hour.

There is a command in the mod that should reset all of the labels, which for some maps can be a large source of lag.

1. Add the mod back (but do not start map)
2. Go to mods settings and set init scan radius to 0
3. Start map
4. Run /clear-map-tags-and-data
5. Save map and quit
6. Disable this mod and add the mod that cleans chunks
7. Do whatever that mod does to clear up chunks
8. ???
9. Profit