In service-oriented environments, the fluidity of the marketplace introduces changes in service offerings and subsequent connection failures for users still bound to outdated services. One focus of web services research is the real-time acquisition of new capabilities via service discovery using Universal Description, Discovery, and Integration (UDDI) registries. Another equally valuable usage of UDDI registries, as addressed in this paper, is the real-time assurance of service responsiveness. UDDI registries can be incorporated into business process execution routines to assure that the underlying services are active at operations time. In this paper, several UDDI modes of operation are evaluated through performance tests of different UDDI implementations. The results of the investigations can be applied as a decision aid for organizations to choose the most efficient utilization of UDDI for the management of responsiveness in their own service-oriented processes.