Your question is Optimize Slow Media List Scrolling. 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 would you diagnose and optimize a slow-scrolling mobile list that renders large media items? Walk through how you would profile it, identify rendering bottlenecks, and improve scrolling performance without breaking correctness or user experience.