I\'ve been arguing with some friends on the university, and we can\'t get to a point to which is the framework with more scalability for web applications (and still very fast).<
I happened to come across this question and noticed that some talk about speed, others scalability. I wrote a blog post explaining the difference:
http://www.fransekman.com/scalability-or-performance-what-do-you-mean/
"A high scalability website is a website, which performance-level can be maintained by adding more capacity when the load increases". This can be achieved in any programming language and almost any framework. Some frameworks have built-in functionality, which may make some common scalability things faster to implement.