Oppenheimer was shot in 55 days.

It's documented that Nolan called IMAX before production saying that he had a 180 page script to check and see if it was possible to fit a 180 minute movie onto an IMAX platter.

They managed it.

That means that Oppenheimer was shot at a rate of 3.27 pages a day.

That's breakneck speed for this size of a movie.

Conversely, assuming five day weeks, Barbie was shot over 80 days.

Given the runtime, Barbie worked on a pace of about 1.4 pages a day.

Oppenheimer was shot on the two most demanding and cumbersome film formats on earth (while also being the best quality). Barbie was shot digitally.

Nolan shaved 30 days off of the production schedule to get the construction of Los Alamos under budget.

Oppenheimer was shot in several locations across These United States. Barbie was shot in and around LA.

Oppenheimer cost about $45 million less to make than Barbie.

Efficiency fucking matters.

Nolan isn't just a great filmmaker because he's a great storyteller. Nolan is a great filmmaker because he plans this shit out better than just about everybody in cinema.