Any way to track "load abandonment"?

Question: Is there any way to track h开发者_如何学Pythonow many website visitors are leaving your site because it takes too long to load?

Running IIS (not sure the version), ASP.NET 1.1, Proprietary Compiled & Obfuscated CMS.

Background: I'm currently working for a conglomerate of 20 companies, and about 8 of their websites are running a proprietary CMS based on ASP.NET 1.1 developed by a local company.

Those sites will frequently not load at all, crash the web server, or take an unacceptable time to load (45 seconds to 1 minute is common).

You could log all the visits to the site using iis logging either to a file or directly into SQL.

Then you could query the data to see the average time a user spends on the site, how many only go to one page and so on.

If page load times are at the 10 second plus range your are in big trouble.

Why not use Google Analytics and track the average time spent on a site/page? Time less than 1 or 2 minutes would mean that you are not capturing your audience.