Question

for this code:

import sys

import gevent
from gevent import monkey

monkey.patch_all()

import requests
import urllib2

def worker(url, use_urllib2=False):
    if use_urllib2:
        content = urllib2.urlopen(url).read().lower()
    else:
        content = requests.get(url, prefetch=True).content.lower()
    title = content.split('<title>')[1].split('</title>')[0].strip()

urls = ['http://www.mail.ru']*5

def by_requests():
    jobs = [gevent.spawn(worker, url) for url in urls]
    gevent.joinall(jobs)

def by_urllib2():
    jobs = [gevent.spawn(worker, url, True) for url in urls]
    gevent.joinall(jobs)

if __name__=='__main__':
    from timeit import Timer
    t = Timer(stmt="by_requests()", setup="from __main__ import by_requests")  
    print 'by requests: %s seconds'%t.timeit(number=3)
    t = Timer(stmt="by_urllib2()", setup="from __main__ import by_urllib2")  
    print 'by urllib2: %s seconds'%t.timeit(number=3)
    sys.exit(0)

this result:

by requests: 18.3397213892 seconds
by urllib2: 2.48605842363 seconds

in sniffer it looks this:

description: first 5 requests are sended by requests library, next 5 requests are sended by urllib2 library.
red – is time when work was freeze, dark – when data receiving… wtf?!

How it posible if socket library patched and libraries must work identically?
How use requests without requests.async for asynchronious work?

Answer 1

Sorry Kenneth Reitz. His library is wonderful.

I am stupid. I need select monkey patch for httplib like this:

gevent.monkey.patch_all(httplib=True)

Because patch for httplib is disabled by default.