perf_test01

  it "takes about 0 seconds to run an empty block" do
    elapsed_time = measure do
    end
    elapsed_time.should be_within(0.1).of(0)
  end

  it "takes exactly 0 seconds to run an empty block (with stubs)" do
    Time.stub(:now) { @eleven_am }
    elapsed_time = measure do
    end
    elapsed_time.should == 0
  end