Performance doc written by me and the team

First of all, Thanks to Neil Feng, if you are not pushing me hard, I won't write something down :) Thank you and the team!You are awesome guys!!

I think it is a good things can be shared with anyone who is interested in performance engineering stuff, so in case you want to take peek at it...:

https://docs.google.com/open?id=0B_hz_q1i5QXJTXZqd0FVblAzNms 

Hope it helps! Any comments or suggestions are welcomed!

--Cheng Chi