Performance Problems

Top 10 serverside Performance Problems:
http://apmblog.compuware.com/2010/06/15/top-10-performance-problems-taken-from-zappos-monster-and-co/
Top 10 client side Performance Problems
http://apmblog.compuware.com/2010/08/25/top-10-client-side-performance-problems-in-web-2-0/