Today, several of our live product sites got a serious issue. The page that renders a list of businesses took over 1 minutes to render. We couldn't find out the problem in serveral hours. After a while keep investigating, we found that the call of below method took about 6 seconds to run:
UrlHelper.Action("action", "controller", RouteValueCollection)
That means on a page that contains 10 links to the business detail...