Solved lag timing

I've heard of a plugin or something that lets you know which of your plugins uses the most memory but I don't know what it's called. A link would be great
~Bloons

i figured it out, its just in bukkit.yml.
My 3 most laggy plugins were mcMMO, WorldGuard and EssentialsProtect. (Surprisingly not Factions)

EDIT by Moderator: merged posts, please use the edit button instead of double posting.