import timeit

try:
    xrange
except:
    xrange = range

def ft(): pass
def ff(): pass

def f_orig(b):
    for i in range(1000000):
        if b: ft()
        else: ff()

def f_opopt(b):
    if b:
        for i in range(1000000):
            ft()
    else:
        for i in range(1000000):
            ff()

def f_dsm(b):
    f = ft if b else ff
    for i in range(1000000):
        f()

def f_rebind(b):
    f, t = ft, ff
    for i in range(1000000):
        if b: f()
        else: t()

def test():
    for f in f_orig, f_opopt, f_dsm, f_rebind:
        print('{}: {}', f.__name__, timeit.timeit(lambda: f(True), number=10))

test()