from __future__ import with_statement
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import math
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import time
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import sys
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from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor
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PRIMES = [
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112272535095293,
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112582705942171,
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112272535095293,
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115280095190773,
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115797848077099,
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117450548693743,
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993960000099397]
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def is_prime(n):
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if n % 2 == 0:
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return False
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sqrt_n = int(math.floor(math.sqrt(n)))
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for i in range(3, sqrt_n + 1, 2):
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if n % i == 0:
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return False
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return True
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def sequential():
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return list(map(is_prime, PRIMES))
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def with_process_pool_executor():
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with ProcessPoolExecutor(10) as executor:
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return list(executor.map(is_prime, PRIMES))
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def with_thread_pool_executor():
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with ThreadPoolExecutor(10) as executor:
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return list(executor.map(is_prime, PRIMES))
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def main():
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for name, fn in [('sequential', sequential),
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('processes', with_process_pool_executor),
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('threads', with_thread_pool_executor)]:
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sys.stdout.write('%s: ' % name.ljust(12))
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start = time.time()
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if fn() != [True] * len(PRIMES):
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sys.stdout.write('failed\n')
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else:
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sys.stdout.write('%.2f seconds\n' % (time.time() - start))
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if __name__ == '__main__':
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main()
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