protected function printAllStatistics()
    {
        $longest_label_chars = 0; // Initialize.

        foreach ($this->stats as $_label => $_value) {
            $longest_label_chars = max($longest_label_chars, mb_strlen($_label));
        }
        echo "\n\n"; // Two lines down...
        echo '- Benchmark ----------------------------------------'."\n";

        $statistics = ''; // Initialize.

        foreach ($this->stats as $_label => $_value) {
            $_label_chars     = mb_strlen($_label);
            $_alignment_chars = $longest_label_chars - $_label_chars;
            $statistics .= $_label.':    '.str_repeat(' ', $_alignment_chars).$_value."\n";
        } // unset($_label_chars, $_alignment_chars);

        echo $this->c::mbTrim($statistics)."\n";

        echo '----------------------------------------------------'."\n\n";
    }