ASP.NET application on IIS7 - very slow startup after iisreset

Question

I have an ASP.NET 3.5 website running under IIS7 on Windows 2008.

When I restart IIS (iisreset), then hit a page, the initial startup is really slow.

I see the f

Answer 1

This hat nothing to do with JIT compiling. The normal C# compiler compiles your code behind files (.aspx.cs) into intermediate language into an assembly at startup if this assembly dont exist or code files have changed. Your web site assembly is located in the "bin" folder of your web site.

In fact the JIT compiling occures after that, but this is very fast and won't take several minutes. JIT Compiling happens on every startup of an .net application and that won't take more than a view seconds.

You can avoid the copmpiling of your web site if you deploy the already compiled website assembly (YourWebsite.dll) into the bin folder. It is also possible to deploy only the aspx files and leave the code behind files (aspx.cs) files away.