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