http://www.perlmonks.org?node_id=1001495


in reply to Re^2: subroutine good practise
in thread subroutine good practise

Have you tried measuring how much difference it will make in the run-time and size of the program to just use both modules? I'm very doubtful that this conditional use will buy you a significant amount of anything, but you're the one who can measure what you're doing.

It also seems to me that you'd be better served by moving those "use"s to the code which needs them, which should probably be in different modules.