Lists: concatenate vs. extend vs. chain

[ichabod801]

Replacing using_chain with:

def using_chain():
    one = range(1, 1000000)
    two = range(1, 1000000)
    three = list(chain(one, two, one, two, one, two))

gets you:

Output:
repeat 10
using concatenation --> 1.96962308884
using extend --> 1.10849690437
using chain --> 1.07177019119

So it works if you are trying to get something to iterate over, but not if you want something you can manipulate as a list.