example on how to do threadpool in ruby

thread_pool.rb

require 'thread'

queue = Queue.new
threads = []

1.step(1000) do |i|
    queue << i
end

8.times do
  threads << Thread.new do
    until queue.empty?
      work_unit = queue.pop(true) rescue nil
        if work_unit
          puts work_unit
          sleep 5
        end
    end
  end
end

threads.map(&:join)