Preloading dependencies

client.rb

require 'drb'

runner = DRbObject.new nil, 'druby://:4321'
runner.run(ARGV)

server.rb

require 'drb'
ARGV.each { |file| require File.expand_path file }
Rails.env = 'test' if defined? Rails 

class Runner
  def run(files)
    fork do
      files.each { |file| require File.expand_path file }
    end
    Process.wait
  end
end

DRb.start_service 'druby://:4321', Runner.new
DRb.thread.join

slow.rb

sleep 2

test.rb

require File.expand_path 'slow'

100.times do
  sleep rand * 0.01
  print '.'
end

threetimes.rb

require File.expand_path 'slow'

3.times do 
  fork do 
    require File.expand_path 'test'
  end

  Process.wait
end