attr_speed.py

class A:
    def __init__(self):
        self.x = 1
        self.y = 2
        
    def get_x(self):
        return self.x
    
    def get_y(self):
        return self.y

a = A()

%timeit a.x
%timeit a.get_x()
%timeit getattr(a, "x", None)

"""
output:

10000000 loops, best of 3: 150 ns per loop
1000000 loops, best of 3: 598 ns per loop
1000000 loops, best of 3: 388 ns per loop
"""