title: How to decide the Ping interval for websocket connection
body: <p>I understand the Ping is to help prevent proxies from closing idle connections. Is there any guidelines w.r.t. how often to ping? Once every second? 10 seconds? Minute? Does it even matter? A preliminary google search gives me nothing, and the <a href="https://www.rfc-editor.org/rfc/rfc6455#section-5.5.2" rel="nofollow noreferrer">websocket spec</a> only says what a ping is, not how often you should do it</p>