I don't use any query but the memory Usage is 17MG in Laravel 7

Hello Guys. I have new laravel 7 Project and I just add the css and js files to the style. But i don't have any DB Query Like this

public function index()
    {
        return view('welcome');
    }

I install Laravel debugger and i show on the Memory Usage is 17MG. What the problem how can i find the it?