See also A Fresh Look at Efficient Perl Sorting

I think you also need to be more clear about exactly what is in your list. Is it strings:

my @list = (
    '100, 10, y',
    '100, 9, n',
    ...,
    '90, 8, n',
    ...,
    );
[download]

or arrays:

my @list = (
    [ 100, 10, y ],
    [ 100,  9, n ],
    ...,
    [  90,  8, n ],
    ...,
    );
[download]

I frequently see  'x, y, z' referred to as a "list" or "array". It's a string.