yes, this happens when we debug with VS or when we run without debugging on IIS. The first time whenever a page is accessed it brings csc.exe to compile the Razor template and it really take 50% CPU time for nearly 10 seconds for each page. I tried the pre-compiler tool and it worked without any errors when I pre-compiled the hosted web site on local IIS. But when I run the app on each page CSC.exe is launched and takes time to load the page. This happens only when first time a page is accessed.
Please notice that we use Feather Bootstrap template.