text: from vbench.benchmark import Benchmark
  from datetime import datetime
  
  common_setup = """from pandas_vb_common import *
  """
  
  #----------------------------------------------------------------------
  # Series constructors
  
  setup = common_setup + """
  data = np.random.randn(100)
  index = Index(np.arange(100))
  """
  
  ctor_series_ndarray = \
      Benchmark("Series(data, index=index)", setup=setup,
                name='series_constructor_ndarray')
  
  setup = common_setup + """
  arr = np.random.randn(100, 100)
  """
  
  ctor_frame_ndarray = \
      Benchmark("DataFrame(arr)", setup=setup,
                name='frame_constructor_ndarray')
  
  setup = common_setup + """
  data = np.array(['foo', 'bar', 'baz'], dtype=object)
  """
  
  ctor_index_array_string = Benchmark('Index(data)', setup=setup)
  