"Once web teams have policies like that in place for popular searches that bog down web performance during beyond-peak, it’s easy enough to set up a dashboard with toggles for web teams to switch between rich and powerful searches and redirects when needed."

"There is a different hint [that fetches the DNS, negociate TLS and setup the connection], called preconnect. It works much in the same way as dns-prefetch but sets up the rest of the connection as well."

"The HTTP Archive is open source and the raw data is available to download. If you want, you can download all of the data, process it locally and query it as much as you want. However, that would require a lot of effort to set up. Google BigQuery makes this much easier, since the data is already loaded and can be easily queried. And because of the processing power behind BigQuery, even some of the most complex queries you write will run extremely fast."

"In a year since Facebook’s blog about Cache-Control Immutable, we can see that it’s usage has spread beyond Facebook and is being used by a handful of large 3rd parties and ~4150 additional domains. Across all of the pages in the HTTP Archive, 2% of requests and 30% of sites appear to include at least 1 immutable response. Additionally, most of the sites that are using it have the directive set on assets that have a long freshness lifetime."

TL;DR: We are making changes to how AMP works in platforms such as Google Search that will enable linked pages to appear under publishers’ URLs instead of the google.com/amp URL space while maintaining the performance and privacy benefits of AMP Cache serving.