> Caching is suggested far too often and too frequently in the Rails world. The solution to "the default tools for template abstraction are too slow to use" is not "use a difficult-to-get-correct system with concerns that cut across the entire project."

I'm not selling caching as a silver bullet (and I'm not saying it's trivial to implement, either). It's just something a lot of people either don't use at all, or just get wrong. And surely, if something can be cached, it should be.

> As someone else mentioned, Rails is much slower than other frameworks. It does an order of magnitude less than 5000 req/s

With Metal endpoints, proper configuration and lot's of resources, this is very possible.