Trent Walton takes a single case experiment. Designs and codes a Web page and adds visual enhancements twice: once with CSS3, and a second time using background images sliced directly from the PSD. He times himself and compares. I believe in the power, speed and “update-ability” of CSS3. Not having to load background images as structural enhancements (such as PNGs for rounded corners and gradients
![CSS3 vs. CSS: A Speed Benchmark — Smashing Magazine](https://cdn-ak-scissors.b.st-hatena.com/image/square/a62cee7fc5250e67076c00ae728f5bd2e0e077c1/height=288;version=1;width=512/https%3A%2F%2Farchive.smashing.media%2Fassets%2F344dbf88-fdf9-42bb-adb4-46f01eedd629%2F9c135ae7-ca46-4e87-a6a1-43dc21143fe8%2Fmercury-automobiles-diagram.jpg)