爬取王者荣耀官方网站采集图片

新手小白一枚，不会异步，爬取王者荣耀的图片速度太慢了，有大佬指点一下吗？

import requests
import json
import time
url="https://pvp.qq.com/web201605/js/herolist.json"
headers={
    "user-agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.71 Safari/537.36 Edg/94.0.992.38"
}
start=time.time()
response=requests.get(url=url,headers=headers)
decodes=response.text
hero_json=json.loads(decodes)
for hero_content in hero_json:
    hero_name=hero_content["cname"]
    serial_number=hero_content["ename"]
    for i in range(1,11):
        img_url="https://game.gtimg.cn/images/yxzj/img201606/skin/hero-info/"+str(serial_number)+"/"+str(serial_number)+"-bigskin-"+str(i)+".jpg"
        try:
            response=requests.get(url=img_url,headers=headers)
            if response.status_code != 404:
                with open(hero_name + str(i) + ".jpg", "wb") as f:
                    f.write(response.content)
        except requests.exceptions.ConnectionError:
            response.status_code="Connection refused"
end=time.time()
print(end-start)