Got CHUD?

No, not C.H.U.D. but Apple's CHUD Tools, a collection of tools for optimizing your application's performance. Apple just released CHUD 4.0 [download Macupdate.com] which most notably contains a signifigant update to Shark, an app that I am just beginning to truly appreciate.

Check out Apple's Optimizing with Shark article for pointers on how to use it.