As a JavaScript Developer at NetSolutions, my responsibilities included maintaining and optimizing web applications. One significant project was enhancing the performance of a large-scale e-commerce site suffering from slow page load times and sluggish navigation between products.
Our team identified inefficient DOM manipulation as the main contributor to performance lag. We implemented event delegation to reduce the number of event listeners, and used memoization to prevent unnecessary function calls. Also, to lower network latency, we employed AJAX calls for dynamic content loading instead of full page refreshes.
We used Browser Performance DevTools to measure the site's performance before and after our improvements, which clearly demonstrated the effectiveness of our efforts. By optimizing our JavaScript code, we managed to reduce load times by 30% and significantly improve overall user interaction responsiveness.