SpigotMC/Spigot — pull request #191 by aikar (2014-07-08 01:44:04+00:00)
Title: Use New Bukkit areNeighborsLoaded for checkIfActive

Bukkit introduced a faster way to see if neighbor chunks are loaded.

This makes checkIfActive use that method of checking instead of the vanilla way, which
checks every neighboring chunk to see if its loaded.