From: Jim Freeze <jim@...>
Date: 2005-05-16T00:01:54+09:00
Subject: Why is this DRb code so slow?

Ok, I'm stumped. I have a simple drb example, and it is
taking about 1 minute to get the value of an array with
two items in it.

  % cat simple-server.rb
  require 'drb'

  def start_daemon
      if (child_pid = fork) 
        File.open(__FILE__+".pid", "w") { |f| f.puts child_pid }
        exit
      end
      Process.setsid
    end
    
  start_daemon

  class MyClass
    def files
      %w(test1 test2)
    end
  end

  DRb.start_service nil, MyClass.new

  puts DRb.uri
  File.open(__FILE__+".uri", "w") { |f| f.puts DRb.uri }
  puts "Server started"
  DRb.thread.join

  % cat simple-client.rb
  require 'drb'
  DRb.start_service 

  server = File.read("simple-server.rb.uri").strip
  puts "Connecting to #{server}"

  begin
    robj = DRbObject.new nil, server
    p robj
    p robj.object_id
    p robj.files

  rescue DRb::DRbConnError => err
    puts "No response from server"
    puts err
  end

  % ruby simple-server.rb
  druby://cheetah.local:49506
  Server started

  % ruby simple-client.rb
  Connecting to druby://cheetah.local:49506
  #<DRb::DRbObject:0xb257c @ref=nil, @uri="druby://cheetah.local:49506">
  365246
  ["test1", "test2"]

The last line takes about a minute to be printed.

-- 
Jim Freeze
Ruby: I can explain it to ya but I can't understand it fer ya.