>perl 589197.pl 1000 -3
          Rate neg_step  b_cmp_a reversed    neg_i
neg_step 301/s       --      -0%      -1%      -1%
b_cmp_a  302/s       0%       --      -1%      -1%
reversed 304/s       1%       1%       --      -0%
neg_i    304/s       1%       1%       0%       --

>perl 589197.pl 1000 -3
          Rate  b_cmp_a neg_step reversed    neg_i
b_cmp_a  301/s       --      -1%      -2%      -2%
neg_step 303/s       1%       --      -1%      -1%
reversed 306/s       2%       1%       --      -0%
neg_i    306/s       2%       1%       0%       --

>perl 589197.pl 1000 -3
          Rate neg_step  b_cmp_a    neg_i reversed
neg_step 301/s       --      -0%      -1%      -2%
b_cmp_a  302/s       0%       --      -1%      -1%
neg_i    305/s       1%       1%       --      -0%
reversed 306/s       2%       1%       0%       --

>perl 589197.pl 10000 -5
           Rate  b_cmp_a neg_step    neg_i reversed
b_cmp_a  22.4/s       --      -1%      -2%      -3%
neg_step 22.6/s       1%       --      -2%      -2%
neg_i    23.0/s       2%       2%       --      -0%
reversed 23.0/s       3%       2%       0%       --

>perl 589197.pl 10000 -5
           Rate neg_step  b_cmp_a reversed    neg_i
neg_step 22.5/s       --      -0%      -2%      -2%
b_cmp_a  22.5/s       0%       --      -2%      -2%
reversed 22.9/s       2%       2%       --      -0%
neg_i    23.0/s       2%       2%       0%       --

>perl 589197.pl 10000 -5
           Rate  b_cmp_a neg_step    neg_i reversed
b_cmp_a  22.5/s       --      -1%      -2%      -2%
neg_step 22.7/s       1%       --      -1%      -1%
neg_i    22.8/s       2%       1%       --      -1%
reversed 23.0/s       2%       1%       1%       --