## changed
sub mcsort {
  @_[
    do {
      my %by;
      my @keys = map { (split '\|:\|', $_, 2)[1] } @_;
      @by{@keys} = 0..$#_;
      @by{sort @keys};
    }
  ];
}

## added
sub myosort {
  sort { (split '\|:\|', $a, 2)[1] cmp (split '\|:\|', $b, 2)[1] } @_;
}

## NEW RESULTS ##
Comparing for 10 elements
        Rate    st    ah   tye    mc   myo
st    8924/s    --   -2%  -42%  -44%  -99%
ah    9098/s    2%    --  -41%  -43%  -99%
tye  15315/s   72%   68%    --   -4%  -98%
mc   15904/s   78%   75%    4%    --  -98%
myo 653579/s 7224% 7084% 4168% 4010%    --

Comparing for 25 elements
        Rate     st     ah    tye     mc    myo
st    3416/s     --   -11%   -43%   -51%   -99%
ah    3853/s    13%     --   -36%   -45%   -99%
tye   5990/s    75%    55%     --   -14%   -99%
mc    6950/s   103%    80%    16%     --   -99%
myo 558070/s 16236% 14382%  9217%  7930%     --

Comparing for 100 elements
        Rate     st     ah    tye     mc    myo
st     748/s     --   -23%   -41%   -58%  -100%
ah     967/s    29%     --   -24%   -46%  -100%
tye   1264/s    69%    31%     --   -29%  -100%
mc    1789/s   139%    85%    42%     --   -99%
myo 323567/s 43138% 33372% 25505% 17984%     --

Comparing for 250 elements
        Rate     st     ah    tye     mc    myo
st     265/s     --   -30%   -38%   -62%  -100%
ah     376/s    42%     --   -12%   -46%  -100%
tye    426/s    61%    13%     --   -38%  -100%
mc     692/s   162%    84%    63%     --  -100%
myo 164515/s 62088% 43687% 38543% 23666%     --

Comparing for 1000 elements
       Rate     st    tye     ah     mc    myo
st   52.9/s     --   -37%   -42%   -64%  -100%
tye  84.1/s    59%     --    -7%   -43%  -100%
ah   90.9/s    72%     8%     --   -38%  -100%
mc    147/s   177%    74%    61%     --  -100%
myo 48711/s 92007% 57796% 53482% 33147%     --

Comparing for 2500 elements
       Rate      st     tye      ah      mc     myo
st   17.6/s      --    -38%    -47%    -61%   -100%
tye  28.5/s     62%      --    -14%    -36%   -100%
ah   33.3/s     89%     17%      --    -26%   -100%
mc   44.8/s    154%     57%     34%      --   -100%
myo 18884/s 107077%  66153%  56551%  42040%      --

Comparing for 10000 elements
      Rate      st     tye      ah      mc     myo
st  3.13/s      --    -35%    -55%    -57%   -100%
tye 4.81/s     54%      --    -31%    -34%   -100%
ah  6.93/s    122%     44%      --     -5%   -100%
mc  7.28/s    133%     51%      5%      --   -100%
myo 3842/s 122850%  79817%  55337%  52666%      --