Python 3.4 asyncio + aiohttp parallel vs sequential requests

bench.txt

$python parallel.py
[13:48:59:130701] Doing GET request to http://google.com
[13:48:59:134958] Doing GET request to http://facebook.com
[13:48:59:135498] Doing GET request to http://twitter.com
[13:48:59:136174] Doing GET request to http://slack.com
****** STATUSES: [{'status': 200, 'url': 'http://google.com'}, {'status': 200, 'url': 'http://twitter.com'}, {'status': 200, 'url': 'http://slack.com'}, {'status': 200, 'url': 'http://facebook.com'}]

$python sequential.py
[13:49:04:078752] Doing GET request to http://google.com
[13:49:04:232725] Doing GET request to http://facebook.com
[13:49:06:723977] Doing GET request to http://twitter.com
[13:49:07:389673] Doing GET request to http://slack.com
****** STATUSES: [{'status': 200, 'url': 'http://google.com'}, {'status': 200, 'url': 'http://facebook.com'}, {'status': 200, 'url': 'http://twitter.com'}, {'status': 200, 'url': 'http://slack.com'}]

parallel.py

import asyncio
import aiohttp

statuses = []


@asyncio.coroutine
def get(url):
    print('[{}] Doing GET request to {}'.format(datetime.now().strftime('%H:%M:%S:%f'), url))
    response = yield from aiohttp.request('GET', url)
    statuses.append({'url': url, 'status': response.status})
    response.close()

urls = ['http://google.com', 'http://facebook.com', 'http://twitter.com', 'http://slack.com']
tasks = [asyncio.Task(get(url)) for url in urls]

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.gather(*tasks))
loop.close()

print('****** STATUSES:', statuses)

sequential.py

import asyncio
import aiohttp

statuses = []


@asyncio.coroutine
def get(url):
    print('[{}] Doing GET request to {}'.format(datetime.now().strftime('%H:%M:%S:%f'), url))
    response = yield from aiohttp.request('GET', url)
    statuses.append({'url': url, 'status': response.status})
    response.close()


@asyncio.coroutine
def main():
    urls = ['http://google.com', 'http://facebook.com', 'http://twitter.com', 'http://slack.com']
    for url in urls:
        yield from get(url)

loop = asyncio.get_event_loop()
loop.run_until_complete(main())
loop.close()

print('****** STATUSES:', statuses)