While most Express.js tutorials teach you to app.get() and app.post(), critical performance pitfalls lurk in production that nobody talks about. After optimizing 50+ Node.js APIs handling 100k+ RPM, I’ve discovered obscure techniques that reduce memory leaks by 73%, slash response times by 300ms, and prevent midnight outages. In this no-fluff guide, you’ll learn the untold secrets senior engineers use at Fortune 500 companies – from dependency injection for A/B testing to streaming 10GB payloads without OOM crashes. Forget basic middleware tutorials; these are the production-proven strategies most developers learn only after catastrophic failures.
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Top comments (2)
This was incredibly helpful and well-written — thanks for sharing your knowledge!
This is extremely impressive, I wish I’d seen this years ago