求知

User cache to hold connection

http://blogs.msdn.com/b/wenlong/archive/2007/10/27/performance-improvement-of-wcf-client-proxy-creation-and-best-practices.aspx

no sleep of ThreadPool

http://blogs.msdn.com/b/wenlong/archive/2010/02/11/why-does-wcf-become-slow-after-being-idle-for-15-seconds.aspx

http://msdn.microsoft.com/en-us/performance/default.aspx