What is the fastest way to merge two lists in python?

Question

Given,

list_1 = [1,2,3,4]
list_2 = [5,6,7,8]

What is the fastest way to achieve the following in python?

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Answer 1

If you are using python 3, there is one more way to do this and a little bit faster (tested only on python 3.7)

[*list1, *list2]

Benchmark

from timeit import timeit
x = list(range(10000))
y = list(x)

def one():
    x + y

def two():
    [*x, *y]

print(timeit(one, number=1000, globals={'x':x, 'y': y}))
print(timeit(two, number=1000, globals={'x':x, 'y': y}))
0.10456193100253586
0.09631731400440913