python多进程爬虫

import re
import time
from multiprocessing import Pool
import requests

headers = {
    'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64; rv:61.0) Gecko/20100101 Firefox/61.0'
}

def re_scraper(url):
    res = requests.get(url,headers=headers)
    names = re.findall('
(.*?)
',res.text,re.S)
    contents = re.findall('
.*?.*?(\d+)',res.text,re.S)
    comments = re.findall('(\d+) 评论',res.text,re.S)

    infos = list()
    for name,content,laugh,comment in zip(names,contents,laughs,comments):
        info = {
            'name':name,
            'content':comment,
            'laugh':laugh,
            'comment':comment,
        }
        infos.append(info)
        return  infos

if __name__ == "__main__":
    # re_scraper("https://www.qiushibaike.com/8hr/page/1/")
    urls = ["https://www.qiushibaike.com/8hr/page/{}/".format(str(i)) for i in range(1,35)]
    start_1 = time.time()
    for url in urls:
        re_scraper(url)
    end_1 = time.time()
    print('串行爬虫时间:',end_1-start_1)

    start_2 = time.time()
    pool = Pool(processes=2)
    pool.map(re_scraper,urls)
    end_2 = time.time()
    print('2进程爬虫耗时:',end_2-start_2)


    start_3 = time.time()
    pool = Pool(processes=4)
    pool.map(re_scraper,urls)
    end_3 = time.time()
    print('2进程爬虫耗时:',end_3-start_3)