I’ve been trying to get back in the habit of blogging about my Clojure development experience more; here’s a little article about performance optimization at scale I put together.
Neat! One tiny question: any reason for using
(reduce into  extras#) instead of
(into  cat extras#)?
No particular reason;
reduce here is more idiomatic for me, I only reach for transducers when I’m working on a performance problem.