Non-blocking system call using goliath

Gemfile

source "http://rubygems.org"
gem "goliath"

long_running_system_call.rb

require "rubygems"
require "bundler/setup"
require "goliath"

class LongRunningSystemCall < Goliath::API
  def response(env)
    fiber = Fiber.current
    EM.system('sleep 5') do |output,status|
      fiber.resume
    end
    Fiber.yield

    [200, {}, "Hello world"]
  end
end

# Use ruby 1.9.2!
#
# ruby long_running_system_call.rb -e prod
#
# ab -c100 -n100 http://127.0.0.1:9000/
# Concurrency Level: 100
# Time taken for tests: 5.657 seconds !!!
# Complete requests: 100