Your question is Debugging Performance Bottlenecks. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How do you approach debugging performance bottlenecks in a large-scale codebase?
Focus on how you would identify the highest-impact bottleneck, coordinate with engineers and product owners, and decide what to measure first. Explain how you would balance quick wins, deeper root-cause analysis, and delivery risk.