Allow me to introduce you to my friend, MESS SVN r14424:

Code
Game		Before		After		Ratio
Mario 64	52.25%		82.75%		1.58
Tetrisphere	46.24%		86.83%		1.88
Mario Kart 64	55.92%		115.81%		2.07
Pokemon Snap	17.66%		49.20%		2.79
Majora's Mask	46.15%		103.49%		2.24

All games tested with multithreading on, the number of CPUs set to 4, and -str 60 on an i7-960 at 3.2GHz.