faster too

  $ time sort < t > t-sh
  real    0m0.016s
  user    0m0.008s
  sys     0m0.008s

  $ time py -c "import sys; open(sys.argv[1],'w').writelines(sorted(open(sys.argv[2]).readlines()))" t-py t
  real    0m0.088s
  user    0m0.056s
  sys     0m0.012s

BTW also a different result (I curled this page for the data).