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concurrency_in_python
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update primefac func name

This commit is contained in:
Andrew Macmillan 2021-01-30 13:42:27 +00:00
parent 10df6f8625
commit 12db9a813e
1 changed files with 12 additions and 12 deletions
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24
single_process_vs_multi_process/main.py
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@ -3,22 +3,23 @@ from random import randint
from time import time from time import time
# This example compare the speed of CPU-bound operations # This example compare the speed of CPU-bound operations
# when using a sequential method and also when using a # when using a sequential method and also when using a
# multi-process method with the 'multiprocessing' Python # multi-process method with the 'multiprocessing' Python
# package # package
def calculatePrimeFactors(n): def calculatePrimeFactors(n):
primfac = [] prime_factors = []
d = 2 d = 2
while d*d <= n: while d*d <= n:
while (n % d) == 0: while (n % d) == 0:
primfac.append(d) # supposing you want multiple factors repeated # supposing you want multiple factors repeated
prime_factors.append(d)
n //= d n //= d
d += 1 d += 1
if n > 1: if n > 1:
primfac.append(n) prime_factors.append(n)
return primfac return prime_factors
# Sequential Example # Sequential Example
@ -34,14 +35,13 @@ def seq_crunch():
return f'{t1-t0:.2f}' return f'{t1-t0:.2f}'
# Multi-processing Example # Multi-processing Example
def executeProc(): def executeProc():
for i in range(1000): for i in range(1000):
rand = randint(20000, 100000000) rand = randint(20000, 100000000)
calculatePrimeFactors(rand) calculatePrimeFactors(rand)
def multi_proc_crunch(): def multi_proc_crunch():
@ -60,11 +60,11 @@ def multi_proc_crunch():
t1 = time() t1 = time()
return f'{t1-t0:.2f}' return f'{t1-t0:.2f}'
if __name__ == '__main__': if __name__ == '__main__':
seq_time = seq_crunch() seq_time = seq_crunch()
multi_proc_time = multi_proc_crunch() multi_proc_time = multi_proc_crunch()
print('\n==================================') print('\n==================================')
print(f'Time to crunch prime factors sequentially: {seq_time}s') print(f'Crunch prime factors sequentially: {seq_time}s')
print(f'Time to crunch prime factors using multi-processing: {multi_proc_time}s') print(f'Crunch prime factors using multi-processing: {multi_proc_time}s')
print('==================================') print('==================================')