Tammy Everts is chief experience officer at SpeedCurve, where she helps companies understand how visitors use their websites. She has spent the past two decades studying how people use the web. Since 2009, she’s focused on the intersection between web performance, user experience, and business metrics. Tammy’s book, Time Is Money: The Business Value of Web Performance (O’Reilly), is a distillation of much of this research (but there’s always more to be learned). She co-curates (with Tim Kadlec) WPO Stats, a collection of performance case studies.