Performance is a key factor in the development and execution of modern computer systems and networks. In order to understand the performance of a computer system, the elements of the system must be defined as well as the evaluation strategy. The Internet 2 end-to-end performance initiative is focused on performance measurement, analysis, and improvements that lead to a standard set of network capabilities and limitations. By using current Internet 2 project groups, the end-to-end performance initiative is a collaborative effort that will maximize current infrastructure performance and provide guidelines for future systems. The focal points of this initiative are: network applications, end computer and operating systems, and the supporting network. As a result of this performance initiative, a performance evaluation and review framework will provide direction for current and future network development.