> I think it is described in the following page. > > http://perldoc.perl.org/perl581delta.html#Hash-Randomisation Makes sense, I guess. Just makes serializing using hash values a bit problematic. I created a home brew string hash which should work for me [1]. Using md5 would also be an option I suppose, though one would have to require openssl. Thanks! -r [1] https://github.com/rdp/faster_require/commit/7bcb8ead99d3337534cdb43610a0dfb12b871aab