$ perl depth.pl
             Rate    h_c_a h_no_c_a
h_c_a    674632/s       --     -14%
h_no_c_a 782184/s      16%       --
             Rate h_no_c_b    h_c_b
h_no_c_b 521502/s       --     -10%
h_c_b    578953/s      11%       --
             Rate h_no_c_c    h_c_c
h_no_c_c 376222/s       --     -23%
h_c_c    490846/s      30%       --
              Rate    a_c_a a_no_c_a
a_c_a     964660/s       --     -15%
a_no_c_a 1129931/s      17%       --
             Rate    a_c_b a_no_c_b
a_c_b    718901/s       --      -4%
a_no_c_b 745514/s       4%       --
             Rate a_no_c_c    a_c_c
a_no_c_c 549898/s       --     -12%
a_c_c    625570/s      14%       --