Hi Samuel,maybe you are interested in the mod_arm4 module (http://svn.apache.org/repos/asf/httpd/sandbox/mod_arm4/) which measures any HTTP request by using the Application Response Measurement (ARM) standard. All you need is an implementation of an ARM agent and you'll get the response time of any served HTTP request.
A free of charge community edition and an optimized mod_arm4 module is provided by my own company. Have a look at http://www.myarm.com
Regards, Stefan
