Ruby performance patch.

$ rvm use ruby-1.9.3-p194
$ time rails s thin
real    0m12.019s
user    0m10.098s
sys 0m1.001s


$ rvm use ruby-1.9.3-p286-falcon
$ time rails s thin
real    0m5.490s
user    0m3.758s
sys 0m0.841s

$ rvm use ruby-1.9.3-p286-falcon --default