Lazy Evaluation Is Really Powerful

Lazy evaluation is really effective. And I have found that it actually does not impact my workflow at all theoretically, you would want intermediary steps along the way. But if you're just thinking critically about what the end result needs to be, and you have something that will optimize how to get there, that's very powerful. So I really enjoyed that aspect from Spark. We also thought it would be useful to before we get more into the ML side to talk about how exactly Spark works in terms of distributing work across different cores.