欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Python 不同列表时间测试

程序员文章站 2023-12-25 09:12:21
1 import timeit 2 import threading 3 4 def test1(): 5 l = [] 6 for i in range(1000): 7 l = l + [i] 8 9 10 def test2(): 11 l = [] 12 for i in range(100... ......
 1 import timeit
 2 import threading
 3 
 4 def test1():
 5     l = []
 6     for i in range(1000):     
 7         l = l + [i]
 8 
 9 
10 def test2():
11     l = []
12     for i in range(1000):  
13             l.append(i)
14 
15 
16 def test3():
17     l = [i for i in range(1000)]  
18 
19 
20 def test4():
21     l = list(range(1000))  
22 
26 t1 = timeit.timer("test1()","from __main__ import test1")     
27 print("concat", t1.timeit(number = 1000),"milliseconds")
28 
29 t2 = timeit.timer("test2()","from __main__ import test2")     
30 print("append", t2.timeit(number = 1000),"milliseconds")
31 
32 t3 = timeit.timer("test3()","from __main__ import test3")     
33 print("comprehension", t3.timeit(number = 1000),"milliseconds")
34 
35 t4 = timeit.timer("test4()","from __main__ import test4")     
36 print("listrange", t4.timeit(number = 1000),"milliseconds")
concat 2.0353527 milliseconds
append 0.14437619999999995 milliseconds
comprehension 0.05449919999999997 milliseconds
listrange 0.03860090000000005 milliseconds

 

上一篇:

下一篇: