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Here are some ways to improve your responsiveness using JavaScript:

1. Minimize DOM manipulation: Try to avoid direct manipulation of the DOM whenever possible, as it can be slow and destroy performance. Instead, use techniques such as document fragments, virtual DOM, and templating engines.

2. Use event delegation: Rather than adding an event listener to each individual element on a page, consider using event delegation. This technique involves attaching a single event listener to the parent element and checking for the target element within the event object.

3. Use requestAnimationFrame: The requestAnimationFrame method is a built-in function that lets you schedule animations and other updates to render only when the browser is ready to render them, resulting in smoother and more efficient animations.

4. Use web workers: Web workers let you run time-consuming and processor-intensive tasks in the background, without blocking the main UI thread. This can improve overall responsiveness and keep your app running smoothly even when handling large amounts of data.

5. Optimize your code: Make sure your code is optimized for performance, including minimizing the use of global variables, reducing the number of HTTP requests, using efficient algorithms, and taking advantage of browser caching.

6. Use lazy loading: Lazy loading is a technique that defers the loading of non-critical resources until they are needed, rather than loading everything all at once. This can significantly reduce the load time of your app and improve its responsiveness.