列表遍历和生成器遍历效率对比

昨天敲代码时突然想到一个问题，列表的遍历和生成器的遍历的效率哪个高，也就是for i in [0, 1, 2, 3, 4] 和for i in range(5)这两个表达式哪个效率高？话不多说，上代码

 1 import time
 2 i = 0
 3 l1 = []
 4 while i < 10000000:
 5     l1.append(i)
 6     i += 1
 7 
 8 l2 = []
 9 list_start_time = time.time()
10 for j in l1:
11     l2.append(j)
12 list_end_time = time.time()
13 list_time = list_end_time - list_start_time
14 print("list_time", list_time)
15 
16 l3 = []
17 range_start_time = time.time()
18 for i in range(10000000):
19     l3.append(i)
20 range_end_time = time.time()
21 range_time = range_end_time - range_start_time
22 print("range_time", range_time)

运行结果如下

list_time 2.888223648071289
range_time 3.6887366771698

Process finished with exit code 0

可见range生成器遍历的效率比列表遍历的低，为什么呢？