Hello, I'm currently tracking down all the slowdowns I encounter when using boost in my Visual Studio solutions. Much of the slowdowns seem to happen, because there's a wide inclusion-usage of throughout boost. This seems to be a replicate of , which is not as much used, but equally evil. Inclusion of any of these headers leads to a 20MB increase in Visual Studio IntelliSense database size. I tested to comment out the inclusion of all the generated . This indeed works fine and is a real relief in Visual Studio responsiveness, because although these headers seem to be included from everywhere, they dont seem to be actually used. Tracking down the inclusion paths proves difficult to me, because the Visual-Studio tool doesn't seem to be able to handle the Preprocessor-generated include directives that boost uses extensively (and I'm just a newbie). With the advent of variadic-enabled compilers (Visual Studio 2013RC just arrived), is anybody working on making this mpl-stuff variadic? That would be a major help for almost anybody using tools like IntelliSense or VisualAssist (the vector200.hpp is a wopping 2mb of totally redundant template goodness...). I think I could make the appropriate changes to my local copy, however I have no idea how to write proper boost-worthy code or even how to file it for inclusion. Also I'm not too sure why the different sized vectors have different names and if the client code relies on that, etc., but I could probably find out. Are there any "template-instantiation-coverage"-tests included, so I could check that my variadics are compatible in the use-cases? Any help would be appreciated! With Kind Regards Michael