Python str benchmark

import time

def test0(n):
    for i in range(n):
        line = bytearray()
        line.extend(('1','2','3'))

def test1(n):
    for i in range(n):
        line = '{0}{1}{2}'.format('1','2','3')

def test2(n):
    for i in range(n):
        line = '%s%s%s'%('1','2','3')


def test3(n):
    for i in range(n):
        line = ''.join(('1','2','3'))

def test4(n):
    for i in range(n):
        line = '1'+'2'+'3'



if __name__ == '__main__':

    a =[test0, test1, test2, test3, test4]
    for m in a:

        s = time.time()
        m(100000)

        e = time.time()
        print(e-s)