sub compare_hash_keys {
    my ($h1,$h2) = @_;
    my $test; # A temporary variable for holding a result so it doesn't have to be recomputed.

    my @k1 = keys %$h1;
    my @k2 = keys %$h2;

    $test = @k1 <=> @k2 and return $test;

    for ( 0 .. $#k1 ) {
        $test = $k1[$_] cmp $k2[$_] and return $test;
    }

    return;
}