I generate some code in memory from random size data. This can generate something like 15K classes, and could be even more. The code is stored in a List that I use with the CompileAssemblyFromSource method from the CSharpCodeProvider class.
The thing is, while compiling, I'd like to have a progress report, or maybe an output of whats going on. For the moment, my App just sits there and waits for 5 or 10 minutes.
Is there a way to know how much time this is going to take, or maybe see whats going on. Maybe an other idea ? I hope the answer isn't just a message saying that this process can take a couple of minutes.
As far as I'm aware, there is no way to report the progress of compilation in CodeDOM or the new Roslyn compiler. I think supporting that is a reasonable request, so you might want to consider making a feature request at the Roslyn repo.
In the meantime, you could report progress based on a guess. You can make a guess either based on the input (you're now compiling m kilobytes of code, and compiling n kilobytes usually takes around t seconds, so you expect it to take t / n · m seconds) or based on the last compilation, or both.
(I also considered compiling each file into a separate netmodule and then combine them into one assembly. This would allow you to report progress after each file is compiled. But I think doing this would be too complicated and not worth it just to get progress reporting.)