They'll be infinitesimal faster for the server which will sit idle most of the time anyway... and much slower for you when you make a minor header/footer mod locally, and then you need to re-upload all pages that have a header (i.e. all pages).

I'm sorry, but this project feels more like "art" than a practical tool.

Plus, with a few basic lines of PHP (available on every shared host) you can pre-generate your site statically as well (and on the server, to save you the re-uploading).