Three ways to debug IIS web server failures using logs
Unresponsive and slow pages are both terrible for any website. Even with the best user interface (UI), unresponsive and slow pages negatively affect the customer experience and the brand's reputation. Research from the Nielsen Norman Group has determined that the average user will leave a site after about 10 seconds of waiting for a page to load. If your page takes longer than a few seconds to load, it's time you check your IIS server logs.