Neverblock Net/Http problem

never_block_http.rb

require "rubygems"
require "neverblock"
require "eventmachine"
require "net/http"
require "uri"

def load_timer(url, number_of_requests=50)
  start = Time.now
  EM.run do
    @pool = NB::Pool::FiberPool.new(number_of_requests)
    i = 0
    number_of_requests.times do |i|
      @pool.spawn do
        request_url = URI.parse(url)
        p "Spawning ##{i} request"
        res = Net::HTTP.start(request_url.host, request_url.port) {|client| client.get('/')}
        i += 1
        EM.stop if i == number_of_requests - 1
      end
    end
  end
  finish = Time.now

  puts "Total time - #{finish - start} seconds"
end

if $0 == __FILE__
  load_timer "http://localhost:9999", 5
end