profile of max<>ruby vs pure ruby scheduling

profile.rb

require 'rubygems'
require 'datagrammer'
require 'statarray'

deltas = StatArray.new
ticks = StatArray.new
d = Datagrammer.new(5000)
last = Time.now.to_f
last_tick = 0
d.listen do |slf, msg|
  now = Time.now.to_f
  ticks << msg.last - last_tick
  deltas << (now - last) * 1000
  last = now
  last_tick = msg.last
end
puts "running from Max>UDP ticks for thirty seconds..."
sleep 30
puts "done! calculating..."
# removes bad first values
deltas.shift 
ticks.shift

puts "deltas:"
deltas.to_stats.each_pair {|k,v| puts "#{k}: #{v}"}
puts "-----\nticks:"
ticks.to_stats.each_pair {|k,v| puts "#{k}: #{v}"}

puts "running with -sleep- for thirty seconds"
sleeping = StatArray.new
last = Time.now.to_f
Thread.start do
  loop do
    now = Time.now.to_f
    sleeping << (now - last) * 1000
    last = now
    sleep 0.00520833
  end
end
sleep 30
puts "done! calculating..."
sleeping.shift

puts "deltas:"
sleeping.to_stats.each_pair {|k,v| puts "#{k}: #{v}"}