I don't think that thin will help in this case because Rails is blocking in general. So, you are right because other IOs will still block. You probably need a

I don't think that thin will help in this case because Rails is blocking in general. So, you are right because other IOs will still block. You probably need an app that is built on like: https://github.com/raggi/async_sinatra https://github.com/raggi/async_sinatra