Rack 1.x doesn't have end-to-end streaming, and certainly not with a socket-style API. The Rack specification mandates buffering and rewinding input, and while it's possible to write a rewindable input stream (I've actually seen it done) nobody has ever written a stable one.
EventMachine is poorly maintained and doesn't have the same level of community support as Node.js, not to mention an ugly API. Of course, Node.js doesn't have the same level of maturity as Twisted Python but Twisted doesn't get any hype whatsoever.
Comments
Rack 1.x doesn't have end-to-end streaming, and certainly not with a socket-style API. The Rack specification mandates buffering and rewinding input, and while it's possible to write a rewindable input stream (I've actually seen it done) nobody has ever written a stable one.
EventMachine is poorly maintained and doesn't have the same level of community support as Node.js, not to mention an ugly API. Of course, Node.js doesn't have the same level of maturity as Twisted Python but Twisted doesn't get any hype whatsoever.