This is one of the reasons why the Larry-Rossler is so efficient.

I think that you are thinking of the Guttman-Rosler Transform? 

my @sorted = sort { $b->{id} <=> $b->{id} || $a->{foo} cmp $b->{foo} }
+ @unsorted; # SLOW

[download]

Comparing $b->{id} to itself will not work very well.

In reply to Re^3: Rosetta Code: Long List is Long (Updated Solutions) by jwkrahn
in thread Rosetta Code: Long List is Long by eyepopslikeamosquito

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