protected function displayLine($name, $timeTotal, $timeStep, $memoryUsage, $memoryPeak)
    {
        $output =
            str_pad($name, 30, ' ', STR_PAD_RIGHT).
            str_pad($timeTotal, 12, ' ', STR_PAD_LEFT).
            str_pad($timeStep, 12, ' ', STR_PAD_LEFT).
            str_pad($memoryUsage, 15, ' ', STR_PAD_LEFT).
            str_pad($memoryPeak, 15, ' ', STR_PAD_LEFT);

        if ($this->htmlOutput) {
            $output = '<pre style="padding:0; margin:0">'.$output.'</pre>';
        }

        echo $output."\n";
    }