You can use Sort::Key::Top, in particular if you want to extract the top 20 for a large array: 
use Sort::Key::Top qw(nkeytopsort);

my @top20 = nkeytopsort { $Averages{$_} } 20 => keys %Averages;

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In reply to Re: Best 20 after sort by salva
in thread Best 20 after sort by seaver

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