Evenprime/Bukkit — comment on commit 1aafa6cdc3385b4a644e87a00be6b4f1f6e494ff
File: src/main/java/org/bukkit/permissions/PermissionAttachment.java line 140
By Evenprime:

Instead of removing permissions one by one with a recalculation of all permissions after each change, rather do it all at once and recalculate only once.