This was all done, they say, in six or eight months.
Now we're on to Full Self Driving for Tesla's cars. After reviewing the number of models they rolled out in a year, and developing the neural network, they're now showing how they develop the decision making. Like with the bot, it's something humans do well but takes a lot of work to model for computers.
The neural network allows them to make the various scenario modelling much faster, which enables running through the dozens of options for the car in any moment, in real time. It's hard to see, but in the last slide they show how they went from 1-5ms per calculation to 100us.