Advantages and Disadvantages of Using WebSocket for Instant Messaging on iOS

  ios, question
  1. Which apps use webSocket for instant messaging?

  2. What are the advantages and disadvantages of using websocket for instant messaging on mobile phones

  3. Can experienced great gods tell better ways of practice?

The cost of websocket is relatively large (the storage structure is relatively direct). The server/client interface, upgrade framework, fault tolerance scheme and high concurrency and high connection scheme should all be considered by themselves.