Except for a few seconds in the beginning and the end, the movie 'Birdman' appears as a continuous long take. The only other movie I can think of like that was Hitchcock's 'Rope' (1946).
But in Rope, (and in most other uses of long take, whether for the entire movie or not), the events occurring during the long take are happening real time. (The famous chase scene from The Secret In Their Eyes comes to mind).
Hence my question: Is Birdman the first movie to capture sporadic events in a long take? Or has it been done before?