itertools vs for loop speed test

itertools_vs_for.py

import timeit
print('------------For loop timeit-------------')
testcode='''
a=[]
for i in range(1,1000):
	a.append(i)
'''
print(timeit.timeit(stmt=testcode))

print('------------itertool timeit-------------')
import_module = "import itertools as its"
testcode='''
a=[]
for i in its.count(start=0,step=1):
	if i<1000:
		a.append(i)
	else:
		break
'''
print(timeit.timeit(stmt=testcode, setup=import_module))