Check performance of loops and arrays in Python

performance.py

from __future__ import print_function
import cProfile
import random

num_elems = 1000000
test = [random.randint(1,100) for i in range(num_elems)]

print("Loops\n*******")

print("Range and Len")
cProfile.run('[test[k] for k in range(len(test))]')

print("Enumerate")
cProfile.run('[test[k] for k,v in enumerate(test)]')

print("For")
cProfile.run('[v for v in test]')

print("Arrays\n*******")
some_value = "Test"

print("Append")
cProfile.run('for i in range(num_elems, 2*num_elems-1): test.append(some_value)')

print("Extend first")
cProfile.run('test.extend([]*num_elems)\nfor i in range(num_elems, 2*num_elems-1): test[i] = some_value')