Phew is a command-line tool that accepts three or four arguments:
Phew [sitePath] [outputPath] [filePath] [copyAll]
- sitePath: the physical path to the site.
- outputPath: the path for the compiled assemblies.
- filePath: the Url of the file to be compiled, like ~/Default.aspx (can be absolute or app relative).
- copyAll (optional): if true, copies all related assemblies; defaults to false (copies only the compiled page).
Note that when testing with Ivonna, you would probably need the whole precompiled site (you can't have both the source page and the compiled assembly in one site). So, first you precompile the site as described in the docs, then you use Phew for faster recompiling of individual pages.
On the other hand, you would probably spend more time developing App_Code classes, since you wouldn't want your views to contain much logic. In that case, use any page and set the 4th argument to true, and your App_Code classes will be recompiled.
Of course, the next logical step would be to create a VS add-in, but don't expect it too soon.