Zoreslav Khimich

Sometimes `_checkDeviceAuthorizationWithCompletion` takes too long before invoking the completion handler, resulting in `_session` being `nil` at the point `startRunning` is called.

Long boring messages break scroll to bottom functionality

3

## What did you do? Launched the demo app, copied and pasted a paragraph from a random Wikipedia article, scrolled up, maybe tapped on the input field to make the...

[Progressive JPEG has numerous advantages over other image formats when used over poor connection/on mobile](https://code.facebook.com/posts/857662304298232/faster-photos-in-facebook-for-ios/).