How I took advantage of concurrency. I found this somewhere and modified it. I don't remember where.

forked.rb

  def do_work_concurrently(number_of_workers = 5)
    config = ActiveRecord::Base.remove_connection
    max = number_of_workers
    pids = []
    any_work = true
    while any_work do 

      # Don't forget to set any_work to false to exit the loop 
  
      pids << fork_with_new_connection(config) {

        #Put your work here!

        exit 99 # This is important if I do remember
      }
      while pids.length >= max
        pids.each do |pid|
          Process.waitpid(pid)
          if $?.exited? == true
            pids.delete pid
          end
        end
      end
    end
    while pids.length != 0
      pids.each do |pid|
        Process.wait(pid)
        if $?.exited? == true
          pids.delete pid
        end
      end
      # I don't remember why I have two loops killing pid's, probably for cleanup
    end
    ActiveRecord::Base.establish_connection(config)
  end
 
  def self.fork_with_new_connection(config, klass = ActiveRecord::Base)
    fork do
      begin
        klass.establish_connection(config)
        yield
      ensure
        klass.remove_connection
      end
    end
  end