Visual Studio BrowserLink
Applies to ASP.NET 4 only
Visual Studio's BrowserLink feature can make your web pages very laggy. There can be a significant delay after loading the page, before the page becomes responsive to user input (~10 seconds). By default, YetaWF turns off BrowserLink in the site's Web.config.
... other settings ...
<add key="vs:EnableBrowserLink" value="false" />
If your browser is unresponsive for a few seconds after displaying each page, try the following:
Windows+R, then type %temp%, delete all the files at that location
Windows+R, then type prefetch, delete all the files at that location