Getting length from a stream efficiently

Question

I need to get the length from a stream at some key. For this I simply do: len(api.liststreamkeyitems('myStream', 'myKey'). However, this takes some time if the returned list is huge. Is there a way to do this efficiently? Note that I just need the length list, not the elements itself.

Answer 1

api.liststreamkeys('myStream') does what I want. It simply returns a list of dictionaries that has fields confirmations, items, key. Items list how many items are there in the corresponding key.

Comments

You can do even better than that. Pass in the specific key you're interested in for the second parameter for liststreamkeys, and you'll get the information about that key only.