Why is creating a class in Python so much slower than instantiating a class?

Question

I found that creation of a class is way slower than instantiation of a class.

>>> from timeit import Timer as T
>>> def calc(n):
...     return         


        

Answer 1

This might give you the intuition:

>>> class Haha(object): pass
...
>>> sys.getsizeof(Haha)
904
>>> sys.getsizeof(Haha())
64

Class object is much more complex and expensive structure than an instance of that class.