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import time
import requests

from tomorrow import threads

@threads(5, timeout=0.1)  # just adding simple line of code
def download(url):
    return requests.get(url)

if __name__ == "__main__":
    start = time.time()
    responses = [download(url) for url in urls]
    html = [response.text for response in responses]
    end = time.time()
    print("Time: %f seconds" % (end - start))