Time used

    Can anyone tell me how to tackle the request and response time. 

I want to know the time taken by event to get back the response. For
example, if I am sending a request at 11:05:00 and response getting
11:05:25, then the time taken is 25 sec. same as of that . I want to
tackle all the event time through Watir test…
It is urgent. Pls reply asap…