How do you improve performance in a Node.js app?

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Accepted Answer

Use clustering or process managers like PM2 to utilize multiple CPU cores. Implement caching (in-memory or distributed caches like Redis). Use asynchronous I/O properly (avoid blocking the event loop). Optimize database queries and use connection pooling. Minimize heavy computations in the main thread (offload with worker threads). Use gzip compression for responses. Properly manage memory leaks. Use load balancers in production.