sleep.rb

results = Hash.new { |h,k| h[k] = Hash.new(0) }
count = (ARGV.shift || 10).to_i

durations = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0]

puts "Running sleep(duration) #{count} times each"
durations.each do |duration|
  count.times do
    zzz = sleep(duration)
    results[duration][zzz] += 1
  end
  puts "sleep(%0.2f) : 0 => %2d, 1 => %2d" % [duration, results[duration][0], results[duration][1]]
end