Perl conditional loading modules http://perldoc.perl.org/Module/Load/Conditional.html http://www.reddit.com/r/perl/comments/218ky9/conditionally_load_a_perl_module/ q. Chapter 12.3 of the Perl Cookbook, Delaying use Until Run Time has a lot to say about native methods, either autouse: q.. http://blogs.perl.org/users/joel_berger/2014/02/reflecting-on-the-dfwpm-winter-hackathon-competion.html https://metacpan.org/pod/if https://github.com/jberger/DeDuperizer/blob/master/deduperizer.pl https://metacpan.org/pod/Class::Load http://search.cpan.org/dist/Perl-Critic/lib/Perl/Critic/Policy/Modules/ProhibitConditionalUseStatements.pm http://stackoverflow.com/questions/3945583/how-can-i-conditionally-use-a-module-in-perl #perl - #programming