As a datapack maker, I like to enhance Mob AI to make game more difficult. But use command to control mob AI involve many detection and scoreboard recoding and as game become more difficult, mob that stack together will kill player in second. So I make a mod to deal with these problem

To deal with the problem. First is to improve the performance by skip entity tick when player is far away, next is to remove entity when other entity nearby unloaded.

Feature

skip entity tick by a calculated chance (default on)
delete entity in group (default off)
regist chunk to prevent 1. to work on farm
change minimal chance (0.1) and the radius (24) that entity start to be skip in config
disable death animation (default on)
disable xp input limit

Caution

Remember to regist chunk your machine and farm located or it may break the farm that require the entity and redstone running at the same speed and decrease the efficiency of entity resources farm such as wool farm and the farm that assemble mob like most of the mob spawner do. Skip tick means no calculation will be operated on entity, and thus they won't even move.

Clear entity in group may clear some entity that usually should be in certain structure like Boss from other mod.(vanilla ones like evoker has been avoided)