How does rate limiting help the event loop?
It prevents one client from overwhelming your server with requests, which can cause event loop congestion. Rate limiting with express-rate-limit caps requests per client per time window, keeping the loop responsive for all users.
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More FAQs in How to Keep the Event Loop Non-Blocking in Node.js
Use async APIs instead of sync, offload CPU-heavy work to worker_threads, use streams for large data, avoid large JSON.parse, use Promise.all for parallel operations, monitor event loop lag, and use rate limiting to prevent overload.
Because sync APIs block the event loop for their entire duration, stopping all other requests. Use async APIs like fs.readFile instead of fs.readFileSync in any code that runs during request processing.
Offload it to worker_threads or a separate process. Do not run heavy computation like image processing or crypto on the main thread, since it blocks all requests. worker_threads run CPU-heavy work on separate threads.
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