import timeit
import math
# Each function checks for all numbers between 1 and a million if they are a power of 2
def log():
for n in range(1, 1000000):
math.log(n, 2).is_integer()
def frexp():
for n in range(1, 1000000):
abs(math.frexp(n)[0]) == 0.5
def log2():
for n in range(1, 1000000):
math.log2(n).is_integer()
def binary():
for n in range(1, 1000000):
(n & (n - 1) == 0) and n != 0
for func in (log, frexp, log2, binary):
num = 5
# taking the average of `num` runs for each function
time = timeit.timeit(func, number=num)/num
print("{}: {:f}".format(func.__name__, time))
