gistfile1.rb

$count = 1000000
def bench0(&block)
  r = Time.now
  $count.times do end
  Time.now - r
end

def bench1(&block)
  r = Time.now
  $count.times(&block)
  Time.now - r
end

def bench2
  r = Time.now
  $count.times do 
    yield
  end
  Time.now - r
end

def bench3(&block)
  r = Time.now
  $count.times do 
    block.call
  end
  Time.now - r
end

def bench4(&block)
  r = Time.now
  $count.times do 
    yield
  end
  Time.now - r
end

puts [ bench0 { 1 }, bench1 { 1 }, bench2 { 1 }, bench3 { 1 }, bench4 { 1 } ].inspect
# => [0.060988, 0.121777, 0.49548, 1.156454, 0.48538]