Do you care about performance? - .NET Performance Testing and Optimization
http://www.red-gate.com/products/ants_performance_profiler/care_about_performance_ebook.htm
My buddy Paul Glavich has written a book on how to optimize performance in an .NET application. Well done Paul!!!!!!!!
In this complete guide to performance profiling, Paul Glavich and Chris
Farrell explain why performance testing is a good idea and walk you through
everything you need to know to set up a test environment. This comprehensive
guide to getting started is an essential handbook to any programmer looking to
set up a .NET testing environment and get the best results out of it. Download
your free copy now.