bendotc

    def mk_list_1(size):
        ls  = []
        cnt = 0

        while cnt <= size:
            ls.append(0)
            cnt += 1

        return ls


    def mk_list_2(size):
        return [0 for i in xrange(size)]

    def mk_list_3(size):
        return [0] * size

    from timeit import timeit
    args = {
        "number":1000000,
        "setup":"from __main__ import mk_list_1, mk_list_2, mk_list_3"
    }
    print "Executing %i runs:" % args["number"]
    print "mk_list_1 took %i s" % timeit('mk_list_1(100)', **args)
    print "mk_list_2 took %i s" % timeit('mk_list_2(100)', **args)
    print "mk_list_3 took %i s" % timeit('mk_list_3(100)', **args)

  Executing 1000000 runs:
  mk_list_1 took 32 s
  mk_list_2 took 10 s
  mk_list_3 took 1 s