srand 0;
my @letters = split //, 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
sub rnd_string{
    my $string;
    for( 1 .. (5 + int rand 10)){
        $string .= $letters[ rand @letters ];
    }
    #say $string;
    return $string;
}

my %hash;
for(1 .. 5_000){
    $hash{rnd_string()} = rand;
}

my @sorted_keys;

for(1..3_000){
    #@sorted_keys = sort { $hash{$b} <=> $hash{$a} } keys %hash;
    @sorted_keys = reverse sort { $hash{$a} <=> $hash{$b} } keys %hash;
    #@sorted_keys = sort { -( $hash{$a} <=> $hash{$b} ) } keys %hash;
}

say scalar @sorted_keys;