Compare the performance about removing last element from iterables (string, tuple, list, deque, numpy.ndarray and bitarray).

remove_last_element_comparison.py

import timeit
import collections
import itertools

import numpy as np
from bitarray import bitarray as b


def test_slice(data):
    for i in reversed(range(len(data))):
        data[:i]


def test_islice(data):
    for i in reversed(range(len(data))):
        list(itertools.islice(data, len(data) - 1))


def test_pop(data):
    while len(data):
        data.pop()


s = '1' * 50
t = (1,) * 50
l = [1] * 50
n = np.fromiter('1' * 50, dtype=np.int8)
bits = b('1' * 50)


print(
    'string slice',
    timeit.timeit('test_slice(s)', globals=globals()),
    sep='\t'
)
print(
    'tuple slice',
    timeit.timeit('test_slice(t)', globals=globals()),
    sep='\t'
)
print(
    'list slice',
    timeit.timeit('test_slice(l)', globals=globals()),
    sep='\t'
)
print(
    'np slice',
    timeit.timeit('test_slice(n)',
                  globals=globals()), sep='\t'
)
print(
    'bitarray slice',
    timeit.timeit('test_slice(b(s))',
                  globals=globals()),
    sep='\t'
)

print(
    'string islice',
    timeit.timeit('test_islice(s)', globals=globals()),
    sep='\t'
)
print(
    'tuple islice',
    timeit.timeit('test_islice(t)', globals=globals()),
    sep='\t'
)
print(
    'list islice',
    timeit.timeit('test_islice(l)', globals=globals()),
    sep='\t'
)
print(
    'deque islice',
    timeit.timeit(
        'test_islice(collections.deque(l))', globals=globals()),
    sep='\t'
)
print(
    'np islice',
    timeit.timeit('test_islice(n)',
                  globals=globals()), sep='\t'
)
print(
    'bitarray islice',
    timeit.timeit('test_islice(b(s))',
                  globals=globals()),
    sep='\t'
)

print(
    'list pop',
    timeit.timeit('test_pop(l)', globals=globals()),
    sep='\t'
)
print(
    'deque pop',
    timeit.timeit('test_pop(collections.deque(l))', globals=globals()),
    sep='\t'
)
print(
    'bitarray pop',
    timeit.timeit('test_pop(b(s))', globals=globals()),
    sep='\t'
)

# Results:

# string slice    3.5368036389991175
# tuple slice     7.19707729899892
# list slice      7.4672492669997155
# np slice        7.595518482998159
# bitarray slice  17.724860723999882
# string islice   52.82672910999827
# tuple islice    39.4152163530016
# list islice     42.93859768499897
# deque islice    45.74156380600107
# np islice       109.97881467600018
# bitarray islice 57.85054062000199
# list pop        0.10694511700057774
# deque pop       0.2539431669974874
# bitarray pop    8.542347485999926