To be prepared for tomorrow’s problems, we have to include performance as an essential consideration, as the desktop-centered web is disappearing before our eyes.
Responsive Design is Not About Screen Sizes Any More is the most comprehensive piece on best practices in RWD, performance, and optimisation that I’ve read recently.
To achieve truly lightweight sites, performance shouldn’t only be a concern, it should be treated as a design feature.
Performance is like any other issue. Sites that overcome it are the ones who acknowledged it from the beginning. And the ones that overlook it are the ones that suffer for it in the end.
“You don’t get to decide which devices access your site, your users do”