What also seems to be missing in Google's metric is that of Page Size. That is, by also having less bytes in the page, then less bandwidth is used. Since less

What also seems to be missing in Google's metric is that of Page Size. That is, by also having less bytes in the page, then less bandwidth is used. Since less bandwidth is used, less energy is used. Unfortunately, Google doesn't measure, nor seem to care about energy consumption, as GoogleBot only cares about response times. (Of course, there are energy concerns regarding that too...but it's only every about speed with google and punishes everyone else for not evangelising it) Using Page Size as metric has important benefits that Page Speed deliberately undermines. It also resurrects the notion that using external cached css and js is a good thing. Did you know that in order to get 10 urls (the thing that you and I actually want) from google, you need to download 500K? It seems ludicrous to me. Each search result is chock-full of css and js that doesn't change. Thankfully HN is old-school and uses external files and good-ol' minimalism. 2c