Looks like they could get a lot of improvement in their render times too if they eliminate all that overdraw in the app.

The news feed is mostly light red (3x overdraw): http://ara.sh/private/facebook_news_feed_overdraw.png

The side bar is simple enough that it shouldn't be overdrawn 2x (green) all over either: http://ara.sh/private/facebook_sidebar_overdraw.png

Compare this to the Google+ feed view which has significantly less overdraw (and scrolls a lot better): http://ara.sh/private/google_plus_news_feed_overdraw.png