Node uses an evented IO layer, that is completely orthogonal (and thus irrelevant) to streaming responses. You can stream responses with blocking IO, and you can buffer responses with evented IO.
> Phusion Passenger is clearly trying to evolve their model to achieve similar if not fully comparable results.
If you think that can happen, you're deluding yourself. Ruby+Rails's model means you need one worker (OS-level, be it a process or a thread does not matter) per connection. With "infinite" streaming responses this means each client ties up a worker forever. OS threads may be cheaper than os processes (when you need to load Ruby + Rails in your process) but that doesn't mean they're actually cheap when you need a thousand or two.
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