best way to introduce channels

[ditschedev]

As I read that topics are costly.

Whats better to implement a „channel“ approach like pusher (e.g. a channel named ‘users/1/notifications’ or ‘tickets/345/watch’)?

1. Using a topic per channel and publish to that topic.
2. Creating a Map with the key being the channel name and the value a Set of sockets. Publish via loop over sockets and ws.send.

I am currently using approach 1.

[e3dio]

Publish is best because iterating Sets can be slow, publish is most convenient and fastest, it will group messages by socket for you

[e3dio]

see @alexhultman did benchmark and 100k topics for 100k users was almost the same speed as 1 topic for 100k users, therefor no reason to not use Publish from what I understand