Entity Detective

A server running Entity Detective gets commands for profiling entities. The find command counts entities by type across dimensions, and the profile command measures how many milliseconds per tick each entity type consumes, sorted by cost. The mod checks the chunk range around a player, the 21×21 area, so a player can examine what is expensive near a location.

Lazy mobs stranded in unloaded chunks are located within 128 blocks of a player. Persistent mobs such as name-tagged creatures, item holders, leashed animals and vehicle riders are listed separately, since they never despawn. Chunk loader detection lists active portal and ender pearl stasis chambers paired across the overworld and the nether, a common cause of server load. Per-dimension summaries show entity counts for the overworld, nether and end at once, and a live mob cap view marks saturation per category with colour coding.

Entity Detective is server-side only, so players join without installing it, and it runs in singleplayer without enabling cheats. Access to the commands needs either operator level 2 or the LuckPerms permission node entitydetective.command. The mod is published for Fabric only, for 26.1 – 26.3, and is open source under the MIT License.