An example of using timeit for bench marking

timeit_benchmark.py

import timeit


setup = """
import pandas as pd
from dateutil import parser
from datetime import datetime

def test_datetime(timestamp):
    try:
        datetime.fromisoformat(timestamp)
    except Exception:
        pd.to_datetime(timestamp).to_pydatetime()


def test_dateutil(timestamp):
    parser.parse(timestamp)


def test_pandas(timestamp):
    pd.to_datetime(timestamp).to_pydatetime()
"""


def time_function(method, timestamp):
    timed_code = f'test_{method}("{timestamp}")'
    time = min(timeit.Timer(timed_code, setup=setup).repeat(7, 10000))
    print("{}: {} ms".format(method, int(time * 1000)))

timestamp = ['2022-08-18T00:00:00', '2022-08-18T00:00:00+00:00', '2022-08-18T00:01:30.000Z']
for t in timestamp:
    print(t)
    time_function('datetime', t)
    time_function("pandas", t)
    time_function("dateutil", t)