public function logSpeed($name = 'Point in Time', $literalTime = null)
    {
        $time = microtime(true);
        if (!is_null($literalTime) && is_float($literalTime)) {
            $time = $literalTime;
        }

        array_push($this->store, array(
            'data' => $time,
            'name' => $name,
            'type' => 'speed'
        ));
    }