Rate  c_pp  c_xs  cbxs  perl
c_pp 3.03e-02/s    --  -97%  -97%  -98%
c_xs     1.07/s 3434%    --   -1%  -34%
cbxs     1.08/s 3453%    1%    --  -33%
perl     1.61/s 5229%   51%   50%    --