Rate  YAML   XML  fast   csv  Syck slurp
YAML  1.39/s    --  -10%  -54%  -97%  -98%  -99%
XML   1.54/s   11%    --  -49%  -97%  -98%  -99%
fast  3.02/s  117%   96%    --  -94%  -96%  -98%
csv   47.2/s 3289% 2959% 1462%    --  -43%  -65%
Syck  82.2/s 5804% 5228% 2622%   74%    --  -39%
slurp  136/s 9638% 8689% 4389%  187%   65%    --