FPS drops down to single digits from this monster spawner

[brandyyn]

Not an archaicfix bug, just something that I'd like for you guys to look into,
when this monster spawner(specifically) is on screen

it drops my fps from whatever it is, in this instance it was 400 to 8, single digits and lags the game like crazy. this can be in NEI, on the ground or in your inventory, it will just destroy your performance.

its ONLY this monster spawner with the tag ml_GenericVillager, which I believe is from the Millenaire mod, I don't know how much of an issue this is with the entities the mod normally spawns as I don't seem to have an issue with them, but if there's some sort of performance problem with the mod that can be fixed that would be cool. I normally don't have this issue as I have all monster spawners hidden with a script from INpureCore