我想从多个服务器下载具有相同名称的文件。但是下面的代码不能正常工作并且速度很慢

import requests
import threading

def download_file(url, save_path):
    response = requests.get(url)
    with open(save_path, 'wb') as file:
        file.write(response.content)

def main():
    urls = ['http://server1.com/file.txt', 'http://server2.com/file.txt', 'http://server3.com/file.txt']
    save_path = 'path/to/save/file.txt'

    threads = []
    for url in urls:
        thread = threading.Thread(target=download_file, args=(url, save_path))
        thread.start()
        threads.append(thread)

    for thread in threads:
        thread.join()

    print('文件下载完成！')

if __name__ == '__main__':
    main()