standalone Glassfish is slow without netbeans

I used the installed glassfish from the netbeans ide. It worked quite well, but
after some week's I used the asadmin script to start the glassfish without the
netbeans IDE.

The Admin-Console http://:4848 was very slow.
The server log file showed a lot of entries about the Netbeans HTTP-Mointor which is not available.

In <.../domain1>/config/default-web.xml was a filter and mapping configuration for the Netbeans listener.
After deleting the entries and restart of glassfish, the old speed was back