gevents vs urllib3

import sys

import gevent
from gevent import monkey

gevent.monkey.patch_all(thread=False)

import grequests
import urllib3
http = urllib3.PoolManager()

def call_back(resp):
    content = resp.content

def worker(url, use_urllib2=False):
    if use_urllib2:
         content = http.request('GET', url)

    else:
        rs = [grequests.get(u) for u in url]
        resps = grequests.map(rs)
        for resp in resps:
            call_back(resp)

urls = ['http://www.google.com/']*50

def by_requests():
    worker(urls)
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 urllib3: %s seconds'%t.timeit(number=3)