Stop Micro-Optimizing Code Nobody Cares About

Advice from a Senior Developer with 25+ years in the IT industry — to every junior dev grinding away on optimizations nobody asked for. They don't teach the real world in bootcamps. Get 25 years of production-grade experience on my YouTube: 🛠️👉 https://www.youtube.com/@lessonsfromproduction You spent a whole day on it. Rewrote the loop. Cached the lookup. Shaved the function call down to almost nothing. You were proud of it. Then your tech lead looked at the PR and asked: "This is clever — but why did you do this?" You didn't have a great answer. That moment has ended more promising careers than bad code ever has. The Comfortable Lie the Industry Tells You Early Here's what you get taught — accidentally — in the early days: Performance matters Fast code is professional code If you can make something faster, you should If you write something a senior engineer can't immediately reverse-engineer — that must mean you're good So you go deep. You learn about memory allocation, cache lines, b