Your question is Optimizing Memory 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 a situation where you had to optimize a piece of code that was causing a memory bottleneck. Be specific about how you diagnosed the issue, which trade-offs you considered, and how you validated the fix. Explain how you communicated the risk, coordinated with others, and took ownership of the outcome.