Either Mesa's IR is doing good job or the alternative GLSL is doing a bad job There is almost no difference between them. Also i must admit the CPU usage is a nice thing, it should be used at most tests be it disk tests, filesystem or graphics. It shows us how "efficient" the code is.
No matter what is written on this forum Michael get's abused every time, if i were him i'd just tell everyone to f*** *** if they don't like it, i actually feel sorry for all the abuses he is taking. I am with you Michael, you are not perfect always but you don't deserve definitely the abuses from some trolls...