Tammy has spent the past two decades studying how people use the web. Her book Time Is Money: The Business Value of Web Performance (O’Reilly) is a data-driven exploration of the intersection between performance, user experience, and business.

Tammy is Chief Experience Officer at SpeedCurve, where she helps companies understand how visitors use their websites. She is a frequent conference speaker, co-curator of WPO stats, and co-chair of the annual performance.now() conference.