What's this request used for exactly? I see the javascript client makes a lot of such calls to Lightstreamer, and the responses are like the following:

<script>d(1,1,'1465560019');</script>

The client sends the request about every half a second. All the documents I found don't mention what the request is for.

A further question: is this request part of LS websocket architecture, or is it part of polling?

Thanks for helping.