With the Sharesight test suite (ruby/rails/mysql && rake test), i tested the performance of my the new MBP on Snow Leopard.

I save 16 seconds per run – its going to take a while to pay for itself…. But about 22% faster, which is not too bad.

Macbook Pro (March 06) 1.83GHz 2G Ram
real 1m29.464s
user 0m50.348s
sys 0m5.812s

Macbook Pro (Sep 09) 2.53 GHz 4G Ram
real 1m13.450s
user 0m43.662s
sys 0m3.280s