60aa5581c1
Download source: https://pythonfutures.googlecode.com/archive/05e0c9c1b3d493f0c7e5833723a1ea99d024bad4.zip
51 lines
1.3 KiB
Python
Executable File
51 lines
1.3 KiB
Python
Executable File
from __future__ import with_statement
|
|
import math
|
|
import time
|
|
import sys
|
|
|
|
from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor
|
|
|
|
PRIMES = [
|
|
112272535095293,
|
|
112582705942171,
|
|
112272535095293,
|
|
115280095190773,
|
|
115797848077099,
|
|
117450548693743,
|
|
993960000099397]
|
|
|
|
def is_prime(n):
|
|
if n % 2 == 0:
|
|
return False
|
|
|
|
sqrt_n = int(math.floor(math.sqrt(n)))
|
|
for i in range(3, sqrt_n + 1, 2):
|
|
if n % i == 0:
|
|
return False
|
|
return True
|
|
|
|
def sequential():
|
|
return list(map(is_prime, PRIMES))
|
|
|
|
def with_process_pool_executor():
|
|
with ProcessPoolExecutor(10) as executor:
|
|
return list(executor.map(is_prime, PRIMES))
|
|
|
|
def with_thread_pool_executor():
|
|
with ThreadPoolExecutor(10) as executor:
|
|
return list(executor.map(is_prime, PRIMES))
|
|
|
|
def main():
|
|
for name, fn in [('sequential', sequential),
|
|
('processes', with_process_pool_executor),
|
|
('threads', with_thread_pool_executor)]:
|
|
sys.stdout.write('%s: ' % name.ljust(12))
|
|
start = time.time()
|
|
if fn() != [True] * len(PRIMES):
|
|
sys.stdout.write('failed\n')
|
|
else:
|
|
sys.stdout.write('%.2f seconds\n' % (time.time() - start))
|
|
|
|
if __name__ == '__main__':
|
|
main()
|