text: # It's intended that this script be run by hand.  It runs speed tests on
  # hashlib functions; it does not test for correctness.
  
  import sys, time
  import hashlib
  
  
  def creatorFunc():
      raise RuntimeError, "eek, creatorFunc not overridden"
  
  def test_scaled_msg(scale, name):
      iterations = 106201/scale * 20
      longStr = 'Z'*scale
  
      localCF = creatorFunc
      start = time.time()
      for f in xrange(iterations):
          x = localCF(longStr).digest()
      end = time.time()
  
      print ('%2.2f' % (end-start)), "seconds", iterations, "x", len(longStr), "bytes", name
  
  def test_create():
      start = time.time()
      for f in xrange(20000):
          d = creatorFunc()
      end = time.time()
  
      print ('%2.2f' % (end-start)), "seconds", '[20000 creations]'
  
  def test_zero():
      start = time.time()
      for f in xrange(20000):
          x = creatorFunc().digest()
      end = time.time()
  
      print ('%2.2f' % (end-start)), "seconds", '[20000 "" digests]'
  
  
  
  hName = sys.argv[1]
  
  #
  # setup our creatorFunc to test the requested hash
  #
  if hName in ('_md5', '_sha'):
      exec 'import '+hName
      exec 'creatorFunc = '+hName+'.new'
      print "testing speed of old", hName, "legacy interface"
  elif hName == '_hashlib' and len(sys.argv) > 3:
      import _hashlib
      exec 'creatorFunc = _hashlib.%s' % sys.argv[2]
      print "testing speed of _hashlib.%s" % sys.argv[2], getattr(_hashlib, sys.argv[2])
  elif hName == '_hashlib' and len(sys.argv) == 3:
      import _hashlib
      exec 'creatorFunc = lambda x=_hashlib.new : x(%r)' % sys.argv[2]
      print "testing speed of _hashlib.new(%r)" % sys.argv[2]
  elif hasattr(hashlib, hName) and callable(getattr(hashlib, hName)):
      creatorFunc = getattr(hashlib, hName)
      print "testing speed of hashlib."+hName, getattr(hashlib, hName)
  else:
      exec "creatorFunc = lambda x=hashlib.new : x(%r)" % hName
      print "testing speed of hashlib.new(%r)" % hName
  
  try:
      test_create()
  except ValueError:
      print
      print "pass argument(s) naming the hash to run a speed test on:"
      print " '_md5' and '_sha' test the legacy builtin md5 and sha"
      print " '_hashlib' 'openssl_hName' 'fast' tests the builtin _hashlib"
      print " '_hashlib' 'hName' tests builtin _hashlib.new(shaFOO)"
      print " 'hName' tests the hashlib.hName() implementation if it exists"
      print "         otherwise it uses hashlib.new(hName)."
      print
      raise
  
  test_zero()
  test_scaled_msg(scale=106201, name='[huge data]')
  test_scaled_msg(scale=10620, name='[large data]')
  test_scaled_msg(scale=1062, name='[medium data]')
  test_scaled_msg(scale=424, name='[4*small data]')
  test_scaled_msg(scale=336, name='[3*small data]')
  test_scaled_msg(scale=212, name='[2*small data]')
  test_scaled_msg(scale=106, name='[small data]')
  test_scaled_msg(scale=creatorFunc().digest_size, name='[digest_size data]')
  test_scaled_msg(scale=10, name='[tiny data]')
  