<ACACGAAGCGCTCGTGTGATTATCT>
x_cap_i: 7521  x_cap: 7521  x_i: 7521  x: 7521
poz: 9496  idx: 9496  ovr_cap_i: 9496  ovr_cap: 9496  ovr_i: 9496  ovr: 9496
            Rate ovr_cap   ovr ovr_cap_i  poz ovr_i x_cap x_cap_i  x_i  idx    x
ovr_cap   5.77/s      --  -12%      -69% -70%  -71%  -80%    -81% -83% -92% -92%
ovr       6.60/s     14%    --      -64% -66%  -67%  -77%    -79% -80% -91% -91%
ovr_cap_i 18.4/s    219%  179%        --  -4%   -8%  -36%    -41% -45% -75% -76%
poz       19.1/s    231%  190%        4%   --   -5%  -34%    -39% -43% -74% -75%
ovr_i     20.1/s    248%  204%        9%   5%    --  -30%    -36% -40% -73% -74%
x_cap     28.8/s    399%  337%       56%  51%   44%    --     -7% -14% -61% -62%
x_cap_i   31.2/s    440%  372%       69%  63%   55%    8%      --  -7% -58% -59%
x_i       33.3/s    477%  405%       81%  74%   66%   16%      7%   -- -55% -56%
idx       74.1/s   1183% 1023%      302% 287%  269%  157%    138% 122%   --  -3%
x         76.3/s   1222% 1057%      315% 299%  280%  165%    145% 129%   3%   --

##</code><code>##

$cnt++ while $pos = 1 + index $str, 'AA', $pos;

##</code><code>##

sub lc_x_cap_i {
    my ($str, $cnt) = @_;
    ++$cnt while $str =~ /(aa)/gi;
    return $cnt;
}

sub lc_x_i {
    my ($str, $cnt) = @_;
    ++$cnt while $str =~ /aa/gi;
    return $cnt;
}

##</code><code>##

<AGGTATGATGGTGTAGAGTAACTAG>
x_cap_i: 7506  lc_x_cap_i: 7506  x_cap: 7506  x_i: 7506  lc_x_i: 7506  x: 7506
             Rate lc_x_cap_i   x_cap_i     x_cap    lc_x_i        x_i          x
lc_x_cap_i 27.7/s         --       -1%      -12%      -13%       -14%       -66%
x_cap_i    28.0/s         1%        --      -11%      -12%       -13%       -66%
x_cap      31.6/s        14%       13%        --       -0%        -2%       -61%
lc_x_i     31.7/s        15%       13%        0%        --        -2%       -61%
x_i        32.4/s        17%       16%        2%        2%         --       -60%
x          81.3/s       193%      190%      157%      156%       151%         --