FIX: You experience very slow performance on an initial request to an ASP.NET Web site after you change the App_Code folder, the bin folder, or the Global.asax file
Doesn’t seem like most people know about it as i have not seen any blog posts in relation to this.
Works beautifully for the most part and i have actually dropped in .dll’s on our production server from time to time without any performance issues.
It’s been long overdue. Doesn’t speed up compilation, rather it compiles the files in a smart way now.