Is there any way to set (i. e. reduce) the polling frequency for Socket.IO (v4.4) when using the long polling transport? Either on the server or the client?
The long polling transport is described in the documentation, and usually acts as a fallback (but can be explicitly set) when a WebSocket connection cannot be established:
The bidirectional channel between the Socket.IO server (Node.js) and the Socket.IO client (browser, Node.js, or another programming language) is established with a WebSocket connection whenever possible, and will use HTTP long-polling as fallback.