Since this has come up a few times already:
ab -c 5 -n 10 <a href="http://127.0.0.1:3000/widgets/http" rel="nofollow">http://127.0.0.1:3000/widgets/http</a><p>That's not a benchmark, it's a proof of concept:
<a href="http://github.com/igrigorik/async-rails/blob/master/app/controllers/widgets_controller.rb#L3" rel="nofollow">http://github.com/igrigorik/async-rails/blob/master/app/cont...</a><p>/widgets/http makes an http request to /widgets, which does a 1s sleep query inside of mysql. All of this is happening on the same reactor loop, and finishes with ~2s, aka, the sleeps are not blocking the reactor and hence the "async stack".