Clients that support HTTP's per-server connection limitation might run into trouble when opening multiple pages from a site if each page has an EventSource to the same domain. Authors can avoid this using the relatively complex mechanism of using unique domain names per connection, or by allowing the user to enable or disable the EventSource functionality on a per-page basis, or by sharing a single EventSource object using a shared worker.
# Une piste
Posté par Bruno Michel (site web personnel) . En réponse à l’entrée du suivi Inter-locks. Évalué à 3 (+0/-0).
Source : http://www.whatwg.org/specs/web-apps/current-work/multipage/comms.html#notes