I write two code to compute gcd in python3, but math.gcd is much faster than gcd.

Here is my code. def gcd(a, b): while a: a, b = b % a, a return b x, y = map(int, input().split()) print(gcd(x, y))

And another code. import math x, y = map(int, input().split()) print(math.gcd(x, y))

What's the implemention of math.gcd? Thanks in advance.