Question: how many feed instance can be create?

[stefano capra]

Hi,
would affect performance or memory create a Follow.feed() instance with the proper filter on every request of the client or the feed instance should be a "singleton" in the server that get the change, and depending on it use the proper handler?
An example of what i'd like to do would be:

1. the client connect to a certain url
2. during connection, create a Follow.feed() that filter the documents change depending on, for example, the id of the user
3. notify the client when a change happen

Thanks in advance