Profiling different ways for testing if there's an empty string value

gistfile1.txt

$ python -m timeit -s "a, b, c, d, e, f = 'abcdef'" "any(v for v in (a, b, c, d, e, f) if v == '')"
1000000 loops, best of 3: 1.51 usec per loop
$ python -m timeit -s "a, b, c, d, e, f = 'abcdef'" "'' in (a, b, c, d, e, f)"
1000000 loops, best of 3: 0.36 usec per loop
$ python -m timeit -s "a, b, c, d, e, f = ' bcdef'" "any(v for v in (a, b, c, d, e, f) if v == '')"
1000000 loops, best of 3: 1.52 usec per loop
$ python -m timeit -s "a, b, c, d, e, f = ' bcdef'" "'' in (a, b, c, d, e, f)"
1000000 loops, best of 3: 0.354 usec per loop
$ python -m timeit -s "a, b, c, d, e, f = 'abcde '" "any(v for v in (a, b, c, d, e, f) if v == '')"
1000000 loops, best of 3: 1.49 usec per loop
$ python -m timeit -s "a, b, c, d, e, f = 'abcde '" "'' in (a, b, c, d, e, f)"
1000000 loops, best of 3: 0.357 usec per loop
$ python --version
Python 2.7.14