What is the advantage of iteritems?

Question

I am using Python 2.7.5 @ Mac OS X 10.9.3 with 8GB memory and 1.7GHz Core i5. I have tested time consumption as below.

d = {i:i*2 for i in xrange(10**7*3)} #WARN         


        

Answer 1

dict.iter() wins out heavily in python 3.5.

Here is a small performance stat:

d = {i:i*2 for i in range(10**3)}
timeit.timeit('for k in d: k,d[k]', globals=globals())
75.92739052970501
timeit.timeit('for k, v in d.items(): k,v', globals=globals())
57.31370617801076