CodeIgniter very long loading times under Xampp and Wamp server

Yes, I have configured the baseURL to a different one by .env with trailing slash:

app.baseURL = 'http://website.intern/'

It also makes no difference if I set app/Config/App.php public string $baseURL to the Dev Base URL as well. Because the .env has priority. I tested it anyway.

php spark phpini:check is also fine. I use CodeIgniter v4.5.2.