# -- coding: utf-8 --
import cProfile
import pstats

left_column_width = 20
loop_range = range(10000000)

def test1():
    for z in loop_range:
        pass

def test2():
    x = []
    for z in loop_range:
        x.append(z)

def test3():
    x = []
    y = x.append
    for z in loop_range:
        y(z)

test1_profile = cProfile.Profile()
test1_profile.runcall(test1)
test1_profile.print_stats(sort='cumtime')

test2_profile = cProfile.Profile()
test2_profile.runcall(test2)
test2_profile.print_stats(sort='cumtime')

test3_profile = cProfile.Profile()
test3_profile.runcall(test3)
test3_profile.print_stats(sort='cumtime')

print('number of loops:'.ljust(left_column_width, ' '), len(loop_range), '\n')

print("pass:".ljust(left_column_width, ' '), pstats.Stats(test1_profile).total_tt)
print("x.append(z):".ljust(left_column_width, ' '), pstats.Stats(test2_profile).total_tt)
print("y(z):".ljust(left_column_width, ' '), pstats.Stats(test3_profile).total_tt, '\n')