On Mon, Feb 6, 2012 at 9:52 AM, Matthew Wilcox <m...@matthewwilcox.com>wrote:
> I agree that headers are expensive. But are they expensive compared to a > few hundred kilobytes of saved bandwidth because we were able > to successfully negotiate content? Yes. The problem is the word "we". Everyone in the world has to pay the cost for someone else's savings. Find an approach that doesn't introduce a cost to every HTTP request made by every browser. That's not the only problem here--screen size isn't enough, you need to know the device's effective DPI, as well as the issues Boris points out, and there are probably tons of other details--but it's the biggest. -- Glenn Maynard