Does it make sense to write chat in meteor.js?

Question

JavaScript

Does it make sense to chat on meteor? Production is not expected (since I'm a beginner and this is more for practice).
All the examples that I googled with meteor, everywhere the messages are stored in mongo collections, which is a little irrational, as it seems to me (again, I'm new), to make a request to the database every time, and this is real-time ... And is there implementation of web sockets in a meteor (only from the site I learned about ddp, I didn’t really understand what it was, but somehow connected with web sockets).

Please give a detailed answer

PS I know about socket.io/sock.js.

Answer 1

If not for sale, then, apparently, for educational purposes.
If the goal is to understand the meteor, then go ahead. MongoDB is nimble enough for real-time use on a learning scale. You can also try to do it on redis, it seems to be faster on simple selections (and complex ones are not needed in a chat).
If the goal is to write the fastest chat possible, then we keep the current conversations in memory, and after a certain period of inactivity we dump them into the database (mongo, radish, it’s not so important here). In this case, the meteor is not really needed.