code: def test_performance():
      """
      This test will measure the time it takes to import a large file multiple times.
  
      :return: None if passed.  Otherwise, an exception will be thrown.
      """
      startcsv = time.time()
      multi_file_csv = h2o.import_file(
          path=pyunit_utils.locate(
              "bigdata/laptop/airlines_all.05p.csv"
          ),
          na_strings=["\\N"],
      )
      endcsv = time.time()
      print(
          "************** CSV parse time is {0}".format(
              endcsv - startcsv
          )
      )
  
imports: import sys
  import h2o
  import time
  from tests import pyunit_utils
label_desc: Use image node_id 1 for calling a global function with example usage: test_performance() without return types