I strongly disagree. There's no such thing as baseline speed, there's only baseline speed on a given hardware config. Rails does not have a max speed of X reqs/second. It has a max speed of X reqs/second on a given hardware config. If you're profiling your own app you'll have to retest it on your own hardware first to figure out how close to that baseline you are.
Of course there is. The "hello-world" microbenchmark tells you something about the core stack performance of the frameworks relative to one another. This tends to be surprisingly indicative of the relative real-world throughput per node that you may expect for a more complex application.
I.e. Rails (ruby) scores 4 times lower than Python in that micro-benchmark. This is pretty close to the difference that I've observed between real applications on the respective platforms. If anything you'll see the difference magnified in a complex application, but it's unlikely to turn around.
Whether that matters or not in the big picture is a different question (it usually doesn't).
If anything you'll see the difference magnified in a complex application, but it's unlikely to turn around.
I wouldn't say so. The bottleneck in a hello world benchmark might be a component of the framework, but in complex applications it's likely to be something else. Just look at the "Template Test with DB Query": There, Sqlite is the bottleneck, and the performance difference between Django and Rails fades into background completely.
in complex applications it's likely to be something else
Nope. Ruby/Python app-servers always end up CPU-bound, unless you're doing something very much out of the ordinary (such as blocking on an embedded SQLite...).
