Improvements in Web site performance are similar to improvements in energy or fuel efficiency: We make great progress, yet we end up consuming more. Learn how to balance design and features with the need for speed. This session highlights Yahoo!â€™s latest research results and performance breakthroughs. Appleâ€™s iPhone has changed the game for Web browsing on mobile devices. While the iPhone presents new and exciting opportunities for Web developers, it also provides a unique set of performance challenges. Solutions that reduce the number of components improve the user experience greatly by making pages load faster. In this session, we explore case studies that demonstrate how these solutions have accelerated the user experience on Yahoo!â€™s most prominent Web pages. In this session you learn: Performance optimizations that give you the biggest bang for your buck; Latest research results and performance breakthroughs discovered at Yahoo!; Apple iPhoneâ€™s cache characteristics; How to balance features with speed.