How do scalability and performance relate to one another?

While addressing this question, clarify the individual concepts first. Explain that performance refers to how quickly a system can process a single task or request. Scalability, on the other hand, pertains to how a system handles growth or increased load. Once the terms are defined, highlight that a well-performing system might not necessarily be scalable and vice versa. A system that performs well under limited load might not maintain that performance as the load increases unless it's designed for scalability. Thus, while they're interrelated, they serve different aspects of a system's efficiency.