gistfile1.txt

In [3]: consume = collections.deque(maxlen=0).extend

In [4]: def f(a):
   ...:     consume(x for x in a)
   ...:     

In [5]: def g(a):
   ...:     consume(a)
   ...:     

In [6]: def h(a):
   ...:     for x in a:
   ...:         x
   ...:         

In [7]: a = range(100000)

In [8]: %timeit f(a)
100 loops, best of 3: 5.52 ms per loop

In [9]: %timeit g(a)
1000 loops, best of 3: 703 us per loop

In [10]: %timeit h(a)
100 loops, best of 3: 2.32 ms per loop