simevidas, Gmail’s mobile website loads 100 KB of JavaScript, while the desktop site loads over 3 MB.
Once the HTML version kicks the bucket in a few months, I plan to switch to the mobile website on desktop (via UA string spoofing). I just need a basic UI to read and write mostly text messages. I don’t want a bloated web app that loads for multiple seconds. I am being serious. The loading screen genuinely annoys me.
On the web, you have to jump through hoops to get great performance.