The author argues that systems performance evaluation, in the first twenty years of its existence, has developed in substantial isolation with respect to such disciplines as computer architecture, system organization, operating systems, and software engineering. The possible causes for this phenomenon, which seems to be unique in the history of engineering, are explored. Its positive and negative effects on computer science and technology, as well as on performance evaluation itself, are discussed. In the author's opinion, the drawbacks of isolated development outweigh its advantages. Thus, the author proposes instructional and research initiatives to foster the rapid integration of the performance evaluation viewpoint into the main stream of computer science and engineering.