I have a situation where it looks like the easiest solution would be to convert from using relative to absolute paths for included files such as CSS & Javascript. There are around 10 included files in total per page – pretty much the same 10 on most pages.
I’m wondering if there would be any significant overhead (or indeed downside, other than portability) in doing so? This is a LAMP setup on a dedicated sever where everything is running over https.
EDIT: To clarify, I mean going from “../foo.css” to “https://bar.com/foo.css“.
The only extra overhead is that they’ll be slightly larger (hence making the page that contains them exactly that much larger). Unless you’ve got huge numbers of URLs per page, that difference should be negligible.
That said: when in doubt about performance the best thing to do is measure it.