I guess if you're not writing new templates in your code then incremental compilation is possible?
I did collect some information on using DMD here (it's a bit Windows-specific but my guess is it works similar on OSX): http://prowiki.org/wiki4d/wiki.cgi?D__Tutorial/CompilingLinkingD If anyone has additions or found erroneous statements I'd invite you to add fix those, please. It's a wiki, after all. :)
