The most important thing for page loading times is reducing the number of network roundtrips required to view a page. A visitor across the globe will have a lat

The most important thing for page loading times is reducing the number of network roundtrips required to view a page. A visitor across the globe will have a latency of around 300ms per request. If you include a javascript that adds a link to a stylesheet, this means you have at least 3 serial requests, and the page loading time is now at least 1 second, no matter how large the bandwidth or how much you compress files. This is also important on mobile. Mobile broadband is optimized for high throughput, but you often have very high latency. Therefore it's especially important to reduce the number of round trips.