Language: C C++ D Haskell Lua OCaml PHP Perl Plain Text Python Ruby Scheme Tcl from time import time import itertools values = xrange(10000000) st = time() for value in (value for value in values if value > 2): pass print time() - st #1.90100002289 st = time() for value in filter(lambda x: x > 2, values): pass print time() - st #2.96499991417 st = time() for value in itertools.ifilter(lambda x: x > 2, values): pass print time() - st #3.06299996376 st = time() relevant_values = (value for value in values if value > 2) for value in relevant_values: pass print time() - st #1.79600000381 Private [?] Run code