sample_fiber.rb

#! /usr/local/bin/ruby22

require 'fiber'

N = 1000000

class PingPong
  def initialize
    @ping_fiber = Fiber.new {
      count = 0
      while count < N do
        @pong_fiber.transfer
        count += 1
      end
    }
    @pong_fiber = Fiber.new {
      count = 0
      while count < N do
        @ping_fiber.transfer
        count += 1
      end
    }
  end

  def run
    @ping_fiber.resume
  end
end

ping_pong = PingPong.new
ping_pong.run

sample_thread_q.rb

#! /usr/local/bin/ruby22

N = 1000000

class PingPong
  def initialize
    q1 = Queue.new
    q2 = Queue.new
    @ping_thread = Thread.new {
      count = 0
      while count < N do
        q1.enq nil
        q2.deq
        count += 1
      end
      q1.enq nil
    }
    @pong_thread = Thread.new {
      q1.deq
      count = 0
      while count < N do
        q2.enq nil
        q1.deq
        count += 1
      end
    }
  end

  def join
    @ping_thread.join
    @pong_thread.join
  end
end

ping_pong = PingPong.new
ping_pong.join

sample_thread_w.rb

#! /usr/local/bin/ruby22

N = 1000000

class PingPong
  def initialize
    @ping_thread = Thread.new {
      Thread.stop
      count = 0
      while count < N do
        @pong_thread.wakeup
        Thread.stop
        count += 1
      end
      @pong_thread.wakeup
    }
    @pong_thread = Thread.new {
      @ping_thread.wakeup
      Thread.stop
      count = 0
      while count < N do
        @ping_thread.wakeup
        Thread.stop
        count += 1
      end
    }
  end

  def join
    @ping_thread.join
    @pong_thread.join
  end
end

ping_pong = PingPong.new
ping_pong.join