The Round-Trip Demo shows the use of the publish & subscribe paradigm.

You can publish some textual values associated to five items and see them distributed in real time to all the browsers connected to that page.

Click on "Publish" to open a window for publishing the values.

When you click on "Submit" the values are sent to a server located in italy and from there they are sent back to the browser. In this way you can perceive the round-trip time of the communication between your browser and the remote server.

Note: When you publish a value your IP address is publicly displayed.