Performance advice nugget 01: use flat representations

This is my last week on my current job, and I was reflecting about some of the things that I've learned in the past 7 years there. There's a lot of course! As a staff data engineer, I worked with many teams and codebases and learned a couple of tricks at scale. So I'm starting a new blog series "performance advice nugget" (or PAN for short), in which I'll share some insights of what worked quite…