Bukkit

WARNING: Due to the nature of TPS calc, this version will only run on Paper servers, on the other server types this fine calculation is not possible for what I have seen.

Solution for bukkit hasn't been found yet, so I accept recommendations.

Java 11+ is required! 

• Includes version checker (compares with dev.bukkit.org page for latest version)
• Explosion protection can now be fine tuned per Y , so it is now set to default -20Y and you can still play with it in caves :)
• Balancing for medium size servers (not static anymore) and works mainly by preventing new mob spawns
  
  • to activate keep config maxChunkEntities > 0, recommended 30 and will work as reference for mobs per chunk (with this value you can have decent mob farms);
  • for more powerfull servers the maxChunkEntities can be increased if needed;
  • TPS based self balancing;
  • logs current adjustments, so if you notice a lag in server you should have a reaction described in log;
  • smooth TPS recovery when server starts soft hanging;
  • for extreme low TPSs, it applies extra controls for fast recovery (should recover in few seconds);
• Controls elytra speed, to reduce chunk generation/load (recommended at 1.2);
• Includes self shutdown, if you have a Windows home server and you want it to turn off after midnight
  • values accepted for autoShutdownTime are from 0 to 7 (in hours);
  • autoShutdown must be set to true (off by default);
  • autoShutDownCounterTime counts how many minutes the server must have 0 players to turn off;
  • shows countdown in server list.

New measures can be added if good recommendations are received, so send your feedback!