The document discusses accelerating PHP applications. It begins by introducing PHP Center of Excellence, whose goals include increasing PHP application maturity and best practices. It then discusses the challenges of developing enterprise PHP applications, highlighting aspects like requirements, architecture, tools, frameworks, testing, optimization, security and deployment. Key points are made around avoiding premature optimization, measuring performance through profiling and analysis, and optimizing areas like code, databases and servers. The document emphasizes that performance is driven by architecture and best practices.