标签：__ timeit seconds 用时 pop 列表 range 末尾 1000
def test1():
l = []
for i in range(1000):
l = l + [i]
def test2():
l = []
for i in range(1000):
l.append(i)
def test3():
l = [i for i in range(1000)]
def test4():
l = list(range(1000))
from timeit import Timer
t1 = Timer("test1()", "from __main__ import test1")
print("concat ",t1.timeit(number=1000), "seconds")
t2 = Timer("test2()", "from __main__ import test2")
print("append ",t2.timeit(number=1000), "seconds")
t3 = Timer("test3()", "from __main__ import test3")
print("comprehension ",t3.timeit(number=1000), "seconds")
t4 = Timer("test4()", "from __main__ import test4")
print("list range ",t4.timeit(number=1000), "seconds")
# 输出
# concat 0.7357939 seconds
# append 0.03698400000000002 seconds
# comprehension 0.01672129999999994 seconds
# list range 0.007648800000000011 seconds
# ('concat ', 1.7890608310699463, 'seconds')
# ('append ', 0.13796091079711914, 'seconds')
# ('comprehension ', 0.05671119689941406, 'seconds')
# ('list range ', 0.014147043228149414, 'seconds')
x = list(range(2000000))
pop_zero = Timer("x.pop(0)","from __main__ import x")
print("pop_zero ",pop_zero.timeit(number=1000), "seconds")
x = list(range(2000000))
pop_end = Timer("x.pop()","from __main__ import x")
print("pop_end ",pop_end.timeit(number=1000), "seconds")
# pop_zero 3.7069058 seconds
# pop_end 3.4799999999890474e-05 seconds
标签：__,
timeit,
seconds,
用时,
pop,
列表,
range,
末尾,
1000
From： https://www.cnblogs.com/heris/p/16783245.html