[michaelfeathers]

> He contests that because a shitty Fibonacci number generator performs poorly Node.js is worthless. I contend that shitty Fibonacci generators are shitty in whatever language or framework.

I don't think he contends that. He was just using Fibonacci as an example to show that IO is not the only way to block a process. Although he doesn't go into it, this issue is one thing that you have to weigh when you decide to use eventing instead of threads: can you break up any potentially long running computation to maintain availability?