Stop EM when all iterations are complete

gistfile1.rb

# is there a good pattern for this routine?

EM.synchrony do
  
  size = keys.count
  counter = 0
  
  # check if each iteration was completed
  EM::add_periodic_timer( 2 ) do 
    next unless counter == size
    EM.stop
  end

  EM::Synchrony::FiberIterator.new(keys, 2000).each {|key|
    do_something_with(key).callback { counter += 1; }
  }

end

Anyways, EM turned out to be not the best approach for this job.