According to embodiments, method, systems, and computer program products are provided for a web server transmitting a response to an access request. An access request for a web application program deployed on a web server is received, where a response corresponding to the access request is composed with a script. A test script is transmitted. A response time of the test script is received. The response time includes a time that the test script is executed in a browser of a client and a time that the test script is transferred over a network. Different responses are transmitted to different types of scripts included in the response corresponding to the access request in accordance with the response time of the test script.