という名称知らなかったが要はロングポーリングとかのこと
Comet (programming) - Wikipedia https://en.wikipedia.org/wiki/Comet_(programming)
Comet is a web application model in which a long-held HTTPS request allows a web server to push data to a browser, without the browser explicitly requesting it. Comet is an umbrella term, encompassin
Long Polling: The client sends a request to the server, which holds the request open until data is available or a timeout occurs. The client then immediately sends another request upon receiving a res
Comet: A broader term that can encompass multiple techniques for achieving real-time updates from the server to the client, including long polling.