Test python3.6 string concatenation performance

test_strings.py

def test1():
    g = 'gg'
    s = 'toto' + g

def test2():
    g = 'gg'
    s = 'toto%s' % g

def test3():
    g = 'gg'
    s = 'toto{}'.format(g)

def test4():
    g = 'gg'
    s = f"toto{g}"


if __name__ == '__main__':
    import timeit
    print(timeit.timeit("test1()", setup="from __main__ import test1", number=1000000))
    print(timeit.timeit("test2()", setup="from __main__ import test2", number=1000000))
    print(timeit.timeit("test3()", setup="from __main__ import test3", number=1000000))
    print(timeit.timeit("test4()", setup="from __main__ import test4", number=1000000))