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# Playing around with the `concurrent.futures` module
# Usage:
#   python concurrent_test.py [number_of_requests=10]
#
from __future__ import print_function
from concurrent.futures import ThreadPoolExecutor
import requests
import time
import sys

def request(__):
    requests.get('http://www.google.com')

def pmap(fn, lst):
    executor = ThreadPoolExecutor(max_workers=8)
    return executor.map(fn, lst)

def timeit(fn, number=1, mapper=map):
    start = time.time()
    list(mapper(fn, range(number))) # Force evaluation of generator
    return time.time() - start

if __name__ == '__main__':
    number_of_requests = int(sys.argv[1]) if len(sys.argv) > 1 else 10
    print('Series ({} requests):'.format(number_of_requests),
          timeit(request, number_of_requests))
    print('Parallel ({} requests):'.format(number_of_requests),
          timeit(request, number_of_requests, mapper=pmap))