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syntax error at /tmp/615254.pl line 41, near "N
    push"

0   1   3   2   4   5   7   8   6
1   0   3   8   2   4   7   6   5
...
6   7   8   3   4   1   2   0   5
7   6   8   3   4   0   1   5   2
8   7   6   3   4   1   2   0   5

#!/usr/bin/perl

...
                0..(N-1);
   }
}

$ perl benchmark-sort.pl
               Rate sort_with_st sort_with_om
sort_with_st 3011/s           --         -61%
sort_with_om 7724/s         156%           --