Abstract: Software performance testing is one of the important techniques used to assure the quality of web services. In order to improve the efficiency and automatization of web service performance testing, a modelbased method for web service performance testing is proposed. Web service performance testing models built by distinct layers are presented. The layers of testing models includes test step model layer, test transaction model layer and test scenario model layer from the bottom up. The lower layer models were reusable for the higher layer model building. Furthermore, a web service performance testing tool is implemented, and an efficient solution is provided for modelbased automatic performance testing.

Key words: web service, performance testing, testing model, testing tool