import threading
from datetime import datetime

import requests

sites = [
    'https://google.com',
    'https://yandex.ru',
    'https://vk.com',
    'https://facebook.com',
    'https://instagram.com',
    'https://avito.ru',
    'https://bing.com'
]


def make_request(site_url):
    response = requests.get(site_url)
    print(site, response.status_code)


start_time = datetime.now()
for site in sites:
    make_request(site)
finish_time = datetime.now()
print('Последовательная загрузка', finish_time - start_time)

threads = []
start_time = datetime.now()
for site in sites:
    threads.append(threading.Thread(target=make_request, args=(site,)))

for th in threads:
    th.start()

for th in threads:
    th.join()

finish_time = datetime.now()
print('Параллельная загрузка', finish_time - start_time)