As we move towards second and third generation Xbox 360 games, the majority of titles are CPU, rather than GPU bound. This presentation draws on the unique perspective of Microsoft’s XDC proactive engineering group to present an across the board survey of the CPU performance issues even the very best developers run into, how you can find those problems, and how you can fix them. Applicable primarily to Xbox 360, this set of mini-case studies forms a next-gen post-mortem that will help developers decide where to focus optimization effort, and ultimately, reassure you that you’re going the right way.