Long lasting business applications in conjunction with modern software architecture may introduce old problems in a new fashion. Applications built in a service oriented environment can leverage existing infrastructure and enable cross-business functionality. Performance has been and is still one important research topic in enterprise applications. Once more because new architecture paradigms bring new challenges to areas which appeared to be uncritical. This paper considers several aspects of performance of applications which are assembled of different components, mainly using services for the joining. Also some thoughts are given about possible ways to improve or rather prevent lacking performance in such an environment.