Dump top ten Ruby objects by count every minute

dump.rb

Thread.start do
  loop do
    objects = Hash.new(0)

    ObjectSpace.each_object { |obj| objects[obj.class] += 1 }

    File.open("/tmp/top_ten_objects.txt", "a") do |file|
      file.puts "-" * 50
      file.puts "PID: #{Process.pid} - #{Time.now.strftime("%c")}"
      file.puts "-" * 50

      Hash[objects.sort_by { |k,v| -v }.take(10)].each_pair do |klass, count|
        file.puts "#{klass.name}: #{count}"
      end
    end

    sleep 60
  end
end