EM defer

Gemfile

source 'http://rubygems.org'

gem 'eventmachine', ">= 1.0.0.beta"

reactor.rb

require 'bundler'
Bundler.require

class Reactor
  def self.run
    @output = []
    @count = 0
    EM.run do
      Signal.trap("INT")  { EventMachine::stop_event_loop }
      Signal.trap("TERM") { EventMachine::stop_event_loop }

      timer = EventMachine::PeriodicTimer.new(0.02) do
        do_something = Proc.new do
          count = 0
          while count < 100000
            count += 1
          end
        end

        #do_something.call
        EventMachine.defer do_something

        @output << "Run time: #{(Time.now - @tick) * 1000}ms" if @tick
        @tick = Time.now
        @count += 1
        if @count == 50
          EventMachine::stop_event_loop
          puts @output.join("\n")
        end
      end
    end
  end
end

Reactor.run