API latency spikes under load where to start profiling, logs, and fixes?
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Begin with load testing using tools like Artillery or k6 to reproduce the issue. Check database queries for missing indexes or N+1 problems. Use tracing libraries like OpenTelemetry to identify slow spans. Optimize by caching frequently accessed data and offloading CPU‑intensive tasks to worker processes or queues.
Hey Rohan, Start by profiling CPU and memory using built‑in tools like node –inspect and Chrome DevTools. Look for long‑running synchronous operations blocking the event loop. Use async/await for I/O‑bound tasks and avoid heavy CPU work in the main thread. Add logging around critical paths and monitor with tools like New Relic or Datadog.