The pronounced slowness was primarily due to an upgrade from jQuery 1.4.2 to 1.4.4 (we're going to downgrade). In addition, we're moving from listening to the s

The pronounced slowness was primarily due to an upgrade from jQuery 1.4.2 to 1.4.4 (we're going to downgrade). In addition, we're moving from listening to the scroll event to a time-based dispatcher for loading subsequent pages of tweets.