Facebook doesn't have a dedicated iOS team, rather each product team (feed, photos, search, messages, etc.) commits code to the app. This allows updates to be m

Facebook doesn't have a dedicated iOS team, rather each product team (feed, photos, search, messages, etc.) commits code to the app. This allows updates to be made faster and more consistent since there aren't multiple product teams for each product for each platform, but it also leads to having a large number of contributors, commits and duplicate code.