Impact of SOAP Implementations in the Performance of a Web Service-Based Application

This article recalls, from the literature, a performance study of a web service. That study, based on the layered queuing network (LQN) paradigm, is now addressed following the PUMA approach to obtain a new performance model, in this case in terms of Petri nets, for the target web service. Such Petri net model is used to extend the previous LQN results with respect to some key web service performance aspects: the SOAP toolkit and the XML parsers. Actually, this paper aims to explore through a case study some of the main concerns of web services performance at the middleware layer. The acquired background is meant to start to develop a methodology, based on the SPE principles, useful to analyze web services performance.