#Performance

Discuss strategies to ensure that the checkout widget loads in under 1 second on 3G networks. What elements should you focus on?

Discuss your experience with database optimization techniques. Can you provide examples of instances where you've improved performance?

Design a system of concurrent progress bars that handle multiple tasks running in parallel. Implement features for starting, pausing, and resetting actions, ensuring independent states for each progress bar. Use simulated asynchronous tasks like setInterval or Promises.

Design the frontend for an Airbnb search listings page. Describe the component hierarchy including filters, list, map, and pagination. Where does the state live? Discuss how you would handle loading and error states, pagination vs infinite scroll, caching search results, and performance optimizations for large result lists.

Describe how you would optimize rendering for a list of 10,000+ items in a React application to ensure smooth user experience.