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| import array
import numpy as np
def add_list(num):
list_a = list([1 for i in range(num)])
list_b = list([1 for i in range(num)])
list_c = list();
for i in range(num):
list_c.append(list_a[i]+list_b[i])
def add_array(num):
arr_a = array.array('i',[1 for i in range(num)])
arr_b = array.array('i',[1 for i in range(num)])
arr_c = array.array('i')
for i in range(len(arr_a)):
arr_c.append(arr_a[i]+arr_b[i])
def add_ndarray(num):
np_a = np.array([1 for i in range(num)])
np_b = np.array([1 for i in range(num)])
np_c = np_a+np_b
import time
ans_list = list()
ans_array = list()
ans_ndarray = list()
def compare_performance():
num = 1
n = 30
for i in range(10):
if i >= 6 :
n = 3
print(f'=====num=10^{i+1}=====')
num*=10
list_start_time = time.time()
for j in range(n):
add_list(num)
list_finish_time = time.time()
ans = (list_finish_time-list_start_time)/n*1000
print(f'list用时：{ans}ms')
ans_list.append(ans)
array_start_time = time.time()
for j in range(n):
add_array(num)
array_finish_time = time.time()
ans = (array_finish_time-array_start_time)/n*1000
print(f'array用时：{ans}ms')
ans_array.append(ans)
ndarray_start_time = time.time()
for j in range(n):
add_ndarray(num)
ndarray_finish_time = time.time()
ans = (ndarray_finish_time-ndarray_start_time)/n*1000
print(f'ndarray用时：{ans}ms')
ans_ndarray.append(ans)
compare_performance()
|
