Is WebSocket restricted to the two-connection limit of HTTP?
This does not appear to be specified. However, since the WebSocket protocol makes no use of metadata, chaos would ensue if a single connection was used to multiplex the traffic of different WebSocket instances. The most natural interpretation is that a new TCP socket is created for each JavaScript construction of a WebSocket object. Typical usage, such as for standalone Ajax components, would have a WebSocket created for each component on the page, potentially resulting in hundreds of connections to the server. Strangely enough, the two-connection limit is the only fundamental aspect that makes using HTTP for Ajax Push difficult, and if we had control over how XMLHttpRequest used the underlying TCP connections, we would be in much better shape. The most dramatic benefit (and greatest risk to scalability) of WebSocket must not be unspecified. Note that socket establishment is expensive, so providing a way to multiplex different endpoints of a protocol over a single connection (as HTTP c
