A very good point, and perhaps this speaks to an area of weakness in my Perl knowledge. Extrapolating to a more general scenario:

There's a module that I'd like to use. It does everything under the sun for a particular area of expertise. I want to use three of its functions, and export only those. Do I or do I not get a penalty in terms of memory/compile speed for having to load the rest of the module into memory at compile time? Even if only those three functions are imported into my name space?