python 列表三中元素添加方式快慢比较（append 加法+ insert）

import timet1 = time.time()s = []for i in range(10000):s = s+[3]print(time.time()-t1)t2 = time.time()k = []for i in range(10000):k.append(3)print(time.time()-t2)t3 = time.time()g = []for i in range(10

DongDu_rabbit

2617人浏览 · 2021-02-18 17:44:45

DongDu_rabbit · 2021-02-18 17:44:45 发布

import time

t1 = time.time()
s = []
for i in range(10000):
    s = s+[3]
print(time.time()-t1)

t2 = time.time()
k = []
for i in range(10000):
    k.append(3)
print(time.time()-t2)

t3 = time.time()
g = []
for i in range(10000):
    g.insert(-1, 3)
print(time.time()-t3)

输出

0.16560864448547363
0.0009524822235107422
0.002002716064453125

可见append 方法速度最快，而加法远远慢于append和insert