Abstract: As a Web exam application, Surveyor Examination System (SES) performance testing is complicated, especially of the simulation of multi-user load. Focused on the real-time, stability and robustness feature, the author designed a LoadRunner-based performance testing process for SES to test the key aspects of the system, the distribution of resources and hardware performance. Based on the analysis of the test results, the key factors that affect system performance were identified and performance optimization methods were proposed. Practices showed these methods eliminated the system performance bottlenecks effectively. This paper provided a general way of performance testing and optimization for the web applications.