Well, algorithm-wise there's absolutely nothing interesting in this article. Every entry-level algorithm class tells you that radix sort is theoretically better

Well, algorithm-wise there's absolutely nothing interesting in this article. Every entry-level algorithm class tells you that radix sort is theoretically better for fixed-size integers, all the author did was copy-pasting the implementation from wikipedia and then optimizing the bottlenecks. I'm not saying it dismissively, I enjoyed the article a lot and think the author did a great job, it just isn't the kind of skill you get from knowing cool algorithms and acing whiteboard interviews