1. Best Practices for Speeding Up Your Web Site by Yahoo Developer Network
2. Make the Web Faster by Google Developers
3. Developing High Performance Web Apps – CodeMash 2011 by Timothy Fisher
Nice presentation with a big agenda and useful tips. By the way: There are a lot of helpful presentations on slideshare. Just search after “web app performance” or something like that.
4. Why mobile web apps are slow by Drew Crawford
5. Mobile Web Performance by Guy Podjarny, Google Tech Talk November 10, 2011
At the end, i want to show you two succeeded videos from Google Tech Talk. Besides, you can find a lot of other interesting videos on the official channel GoogleTechTalks.
Hope these information help you, to speed up your apps.