Load test apparatus and method

The various configurations of the computer, over a common load, to be able to compare their performance. Server 2-1 to 2-n, to the simulator 4, it provides a common interface for receiving a processing request. From the simulator 4, the server 2-1 to 2-n, respectively, sequentially processing request specifying the content of the processing is transmitted. In response to the processing request, the server 2-1 to 2-n performs processing, and returns a processing response against simulator 4. Simulator 4 receives the processing response, from the transmission of the processing request, the processing request processing time required to receive a processing response corresponding to each, and, by aggregating and utilization of various resources of the server 2, to view the summary results to the user.