Your question is Debugging Production 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).
Describe your process for debugging a critical performance bottleneck in a production environment.
Explain how you would establish impact, use observability data to isolate the bottleneck, coordinate with stakeholders, and choose between mitigation and deeper remediation. Cover how you would protect users while debugging, validate the fix, communicate status, and prevent recurrence.