old_contents: import os, sys
  
  sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
  import glob
  import fnmatch
  import traceback
  import logging
  
  import numpy
  import pytest
  
  import lasio
  
  test_dir = os.path.dirname(__file__)
  
  egfn = lambda fn: os.path.join(os.path.dirname(__file__), "examples", fn)
  stegfn = lambda vers, fn: os.path.join(os.path.dirname(__file__), "examples", vers, fn)
  
  logger = logging.getLogger(__name__)
  
  
  def test_read_v12_sample_big():
      l = lasio.read(stegfn("1.2", "sample_big.las"))
  
new_contents: import os, sys
  
  sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
  import glob
  import fnmatch
  import traceback
  import logging
  
  import numpy
  import pytest
  
  import lasio
  
  test_dir = os.path.dirname(__file__)
  
  egfn = lambda fn: os.path.join(os.path.dirname(__file__), "examples", fn)
  stegfn = lambda vers, fn: os.path.join(os.path.dirname(__file__), "examples", vers, fn)
  
  logger = logging.getLogger(__name__)
  
  
  def read_file():
      las = lasio.read(stegfn("1.2", "sample_big.las"))
  
  def test_read_v12_sample_big(benchmark):
      benchmark(read_file)
  
subject: Add benchmark test for the speed of reading a LAS file