How can I optimize my code for mobile devices without sacrificing performance on desktop browsers?

I totally get your concern about balancing performance across different devices - it's a challenge many of us face. I've been in your shoes before, and I've found that one of the key things to focus on is ensuring your code is as lightweight as possible. You've already taken some great steps by optimizing your images and reducing HTTP requests, so that's a good foundation to build on.

One technique that's helped me is using responsive design principles to serve different assets or layouts based on the user's device. For example, you could use media queries to load smaller images or a simplified layout on mobile devices, while still serving the full-featured version on desktop browsers. This way, you can tailor the user experience to each device without compromising performance.

I've also found that leveraging caching and content delivery networks (CDNs) can make a big difference in mobile performance. By caching frequently-used assets and serving them from a CDN, you can reduce the latency and overhead of loading resources over a mobile connection. Additionally, you might want to explore libraries like jQuery Mobile or React Mobile, which are designed to help you build fast, mobile-friendly interfaces without sacrificing desktop performance.

Ultimately, the key is to find a balance that works for your specific use case, and to continually test and refine your approach to ensure you're getting the best results across all devices. I hope this helps, and I'm happy to chat more if you've got any specific questions or need further guidance!