Pro HTML5 Performance provides a practical guide to building extremely fast, light-weight and scalable websites using fully standards compliant techniques and best practices. It strikes a balance between imparting best-practice information for when you're building ground up and instantly applicable techniques to help you solve issues with your existing projects.
In addition to a wealth of tips, tricks and secrets you'll find advice and code samples that elegantly layout the problems your facing and the best ways of solving them.