Benchmark - Récupérer la valeur d’un dictionnaire

Benchmark sur différentes méthodes pour récupérer la valeur d’un dictionnaire:

import timeit
import collections

# get() call
def with_get():
    d = {'foo': "bar"}
    x = d.get('foo', None)

# Brackets call
def with_brackets():
    d = {'foo': 'bar'}
    x = d['foo']

def with_custom_missing_class():
    class myDict(dict):
        def __missing__(self, key):
            return None
    d = myDict({'foo': 'bar'})
    x = d['foo']

def with_caching_of_function_lookup():
    d = {'foo': 'bar'}
    get = d.get
    x = get('foo', None)

def with_brackets_and_in_operator():
    d = {'foo': 'bar'}
    x = d['foo'] if 'abc' in d else None

def with_brackets_and_try_returned():
    d = {'foo': 'bar'}
    try:
        x = d['foo']
    except KeyError:
        pass

def with_brackets_and_try_except_returned():
    d = {'foo': 'bar'}
    try:
        x = d['bar']
    except KeyError:
        pass

def with_collections_default_dict():
    d = collections.defaultdict(lambda: None)
    d['foo'] = "bar";
    x = d['XXX']

timeit.Timer(with_get).timeit(number=50000)
timeit.Timer(with_brackets).timeit(number=50000)
timeit.Timer(with_custom_missing_class).timeit(number=50000)
timeit.Timer(with_caching_of_function_lookup).timeit(number=50000)
timeit.Timer(with_brackets_and_in_operator).timeit(number=50000)
timeit.Timer(with_brackets_and_try_returned).timeit(number=50000)
timeit.Timer(with_brackets_and_try_except_returned).timeit(number=50000)
timeit.Timer(with_collections_default_dict).timeit(number=50000)

Résultats - Python 3.9:

func	duration
with_get	0.010526700000013989
with_brackets	0.00805250000007618
with_custom_missing_class	0.4602535999999873
with_caching_of_function_lookup	0.011689899999964837
with_brackets_and_in_operator	0.008910399999990659
with_brackets_and_try_returned	0.008611599999994723
with_brackets_and_try_except_returned	0.017046899999968446
with_collections_default_dict	0.030047200000012708

Résultats - Python 3.10:

func	duration
with_get	0.0169717710000441
with_brackets	0.01423030299997663
with_custom_missing_class	0.3670625449999534
with_caching_of_function_lookup	0.021030869000014718
with_brackets_and_in_operator	0.018795825000097466
with_brackets_and_try_returned	0.014779266999994434
with_brackets_and_try_except_returned	0.026639114000090558
with_collections_default_dict	0.042068502000120134