Considering how bad the situation is with some other apps in terms of battery usage (looking at Yik Yak and Snapchat) I'm actually impressed that the Facebook a

Considering how bad the situation is with some other apps in terms of battery usage (looking at Yik Yak and Snapchat) I'm actually impressed that the Facebook app manages to keep consumption this low. I'd be interested in seeing more rigorous numbers rather than just comparison to "... a week with the app." That doesn't tell me whether the 15% was from background computation or actual foreground usage.