> When we started development in 2009, few rich web applications existed. And with so few examples, there were no best practices to follow. I think what you ne

> When we started development in 2009, few rich web applications existed. And with so few examples, there were no best practices to follow. I think what you need is not best practices. You need principles. If you take performance as a matter of principle from the get go, you will never ever ship a slow product. Most startups nowadays seem to value design more than performance. They even value the design of their landing page more than they value the design of the actual product. Another thing they seem to value is _perceived_ ease of development, at the expense of performance. I say perceived because, in my experience, what you may perceive initially as a productivity boost ends up becoming a productivity burden as the code size grows.