Ash Patel and Geoff Ralston were the Yahoo! executives who asked me to start a center of expertise focused on performance. Several Yahoo!s helped answer questions and discuss ideas: Ryan Troll, Doug Crockford, Nate Koechley, Mark Nottingham, Cal Henderson, Don Vail, and Tenni Theurer. Andy Oram, my editor, struck the balance of patience and prodding necessary for a first-time author. Several people helped review the book: Doug Crockford, Havi Hoffman, Cal Henderson, Don Knuth, and especially Jeffrey Friedl, Alexander Kirk, and Eric Lawrence.
This book was completed predominantly in spare hours on the weekends and late at night. I thank my wife and daughters for giving me those hours on the weekends to work. I thank my parents for giving me the work ethic to do the late-night hours.