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Gosh, you're a bit of an ass. No offense, of course.

Where are you seeing this code? It looks as though you're using an old version of the SDK, as this was an issue that was fixed months ago - the descriptor is pulled out of the collection, modified, and re-inserted. The latest code doesn't create a new descriptor. This is done because users who are currently speaking are sorted to the top of the userCollection. It takes O(2lgN) to perform the operation, which is fairly reasonable.

I don't understand the last part of your question. "Where to get the real online users" isn't really a phrase I can parse.

nigel