> browsers have such intense requirements on DNS that they may want to do things the OS resolver can't. I don't really agree. If the host's DNS client is using

> browsers have such intense requirements on DNS that they may want to do things the OS resolver can't. I don't really agree. If the host's DNS client is using a good caching algorithm, then it should have a cache hit rate in the 80s or 90s if your hostnames are remotely sensible. Most people go to the same sites over and over, and those sites typically feature content from the same networks. In that case, over 80% of the DNS traffic isn't actually network traffic. It's just querying the host's cache database. Furthermore, the browser knows every link the user has access to on a page or bookmark. They can be (and probably already are) pre-fetching DNS for those sites. In that case, they need to work with OS vendors to optimize that. OS vendors should clearly wish to do this; nearly every user wants a faster Internet experience, and if Google's dev is right that a DNS query is a significant bottleneck, then they should be interested in improving that aspect of the system. It sounds to me like what they want DNS to do is return not just the IP of the actual address, but all the domain names and IPs of all known resources at that domain name. Of course, if you've got a CDN or other system, that makes DNS suddenly very complicated compared to the current system. No, the more I think about this the more it feels like a way to move the Internet away from open DNS towards some siloed proprietary system where the core databases that control who is on the Internet name system suddenly aren't under IANA control.