Rate XML::Simple XML::Twig YAML::Syck Data::Dumper Storable JSON::XS
XML::Simple    422/s          --      -24%       -96%         -97%     -99%     -99%
XML::Twig      556/s         32%        --       -95%         -96%     -99%     -99%
YAML::Syck   11622/s       2652%     1989%         --         -11%     -81%     -84%
Data::Dumper 13039/s       2988%     2244%        12%           --     -79%     -82%
Storable     60964/s      14335%    10859%       425%         368%       --     -18%
JSON::XS     74479/s      17535%    13289%       541%         471%      22%       --