Varun's response lacks specificity and relevance to the question about optimizing JavaScript code for performance. Instead of addressing JavaScript optimization techniques, Varun discusses the process of translating business requirements into functional specifications. This does not align with the question's focus on JavaScript performance challenges and solutions. To improve, Varun should focus on specific JavaScript optimization strategies, such as using tools like Chrome DevTools for performance profiling, implementing debouncing, and refactoring code for efficiency, as outlined in the benchmark response.