Your question is Legacy Refactor for Performance. 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 a time you refactored a legacy module to improve performance. Explain how you identified the bottleneck, evaluated risks and trade-offs, and gained alignment on the approach. Be specific about your actions, the measurable outcome, and what you learned.
