If you use Facebook’s native apps for iPhone and iPad, you’ll be used to them being a bit… slow. And when we say ‘a bit’, we mean ‘mind-crushingly phone-out-of-window-ragingly’ slow. Not any more. The social network updated both apps yesterday, and they are now much faster, thanks to being rebuilt from scratch over the last nine months. It’s an important change for Facebook as it tries to make money from rocketing mobile usage of its service: the smoother and faster the app, the better its mobile ads will perform. We’re wondering when the company will turn its attention to music on mobile devices though: better features to integrate the content being posted on Facebook by artists, beyond the fact that users can click links to YouTube videos, Spotify streams, iTunes tracks and so on.