The book "Computer Performance Optimization" by Wolfgang W. Osterhage offers a comprehensive analysis of performance optimization in computer technology. It highlights the importance of computing power in various contexts, especially during times when complex applications are developed that demand significant system resources. The work distinguishes between three levels of optimization: the system level, the application level, and the business process level. Each of these levels is examined in detail to identify optimization potentials and cost reduction opportunities. The book not only conveys the theoretical foundations but also suitable measurement methods and proposed solutions. An evaluation of network monitors and checklists complements the content and provides practical assistance for implementing the optimization strategies.