Real-time Streaming of Posts

Something I miss from TweetDeck is the option to have tweets loaded as they're posted.

TweetDeck worked by adding new posts to the user's timeline every 17 seconds. Plerome FE could check for and add posts every X seconds and allow the user to disable said behaviour if they find themselves bogged down with new posts all the time.

One question it raises is what to do with old posts. If new ones are being streamed into the feed, older posts would have to be disposed of in memory to avoid long GC pauses or memory leaks.