To troubleshoot slow performance in your web app, analyze network requests, optimize images, and minimize JavaScript execution time.

Web app performance issues can significantly impact user experience and engagement. To effectively troubleshoot slow performance, start by analyzing network requests using browser developer tools. Look for any requests that take an excessive amount of time to complete, especially those related to images, scripts, or API calls. You can use the Network tab to view the loading times and sizes of various resources. If certain files are too large, consider optimizing them. For images, use formats like WebP or JPEG for photos and SVG for graphics, and ensure they are appropriately sized for the web. Compressing images can significantly reduce loading times without sacrificing quality. Additionally, review the JavaScript execution time. If your app relies heavily on JavaScript, large scripts can delay rendering. Consider breaking up large scripts into smaller modules and loading them asynchronously. This practice can enhance perceived performance, as it allows the page to render while scripts load in the background. Look into lazy loading techniques for non-critical resources, ensuring that images and other media only load when they enter the viewport. Moreover, audit your CSS to eliminate unused styles, which can also slow down rendering. Tools like PurgeCSS can help in this process. Additionally, if your web app is built on a front-end framework, ensure that you follow best practices for state management and component optimization. Lastly, consider server-side performance as well. Ensure your server responds quickly to requests and that your back-end APIs are optimized for speed. Implement caching strategies to store frequently accessed data, reducing load times for repeat visitors. By following these steps, you can effectively identify and resolve slow performance issues in your web app.