Could also use multiprocessing, got about ~500req/s returning a 'hello world' response (which the article also does). The article does about 300req/s but that's because he saturates his pipe. The reality is the article might be faster than 1,000,000/hour.

    from multiprocessing import Pool
    from requests import get
    urls = 1000 * ['http://localhost/hello']
    def scrape(url):
        return get(url).text
    p = Pool(40)
    results = p.map(scrape, urls)

~2.2 seconds on a dual core 2.2ghz