certain chunks having absurd amounts of both passive and hostile mobs in them

So there are certain chunks in my world that spawn an absurd amount of mobs, and i'm not entirely sure how spawning works but I'm pretty sure that causes less to spawn elsewhere, because all the chunks around these few highy populated ones have no mobs spawning in them

 

I think I've seen another post similar to this where the guy has too many zombie pigmen, but I just wanted to add mine because its brutal for performance and makes mob spawning so extreme that the game is unplayable in that area.