When deploying ASP.NET applications to a production environment, you will most likely want to set the compilation debug attribute in web.config to false, as having debug set to true has some downsides: Compilation takes longer as batch optimizations are...
Not too long ago we had to do some performance profiling for a Commerce Server site that went into production a couple of months before. We knew we had some performance issues, but because of some inventory issues at the client, we had to rush the site...