Small performance test on class objects creation versus named tuples

class_vs_namedtuple.py

from collections import namedtuple
from pprint import pprint
import sys
import timeit


class C1:
    __slots__ = ('a', )

class C2:
    __slots__ = ('a', )

    def __init__(self):
        pass

class C3:
    __slots__ = ('a', )

    def __init__(self, a):
        self.a = a

class C4:
    def __init__(self, a):
        self.a = a

class C5:
    __slots__ = (
        'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l')

    def __init__(self, a, b, c, d, e, f, g, h, i, j, k, l):
        self.a = a
        self.b = b
        self.c = c
        self.d = d
        self.e = e
        self.f = f
        self.g = g
        self.h = h
        self.i = i
        self.j = j
        self.k = k
        self.l = l

class C6:
    __slots__ = (
        'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
        'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z')

    def __init__(self, a, b, c, d, e, f, g, h, i, j, k, l, m, n,
                 o, p, q, r, s, t, u, v, w, x, y, z):
        self.a = a
        self.b = b
        self.c = c
        self.d = d
        self.e = e
        self.f = f
        self.g = g
        self.h = h
        self.i = i
        self.j = j
        self.k = k
        self.l = l
        self.m = m
        self.n = n
        self.o = o
        self.p = p
        self.q = q
        self.r = r
        self.s = s
        self.t = t
        self.u = u
        self.v = v
        self.w = w
        self.x = x
        self.y = y
        self.z = z


N1 = namedtuple('N1', ('a', ))

N2 = namedtuple('N2', (
    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l'))

N3 = namedtuple('N2', (
    'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
    'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'))


pprint((
    ('C1', sys.getsizeof(C1())),
    ('C2', sys.getsizeof(C2())),
    ('C3', sys.getsizeof(C3(1))),
    ('C4', sys.getsizeof(C4(1))),
    ('C5', sys.getsizeof(C5(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12))),
    ('C6', sys.getsizeof(C6(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26))),
    ('N1', sys.getsizeof(N1(1))),
    ('N2', sys.getsizeof(N2(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12))),
    ('N3', sys.getsizeof(N3(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)))))

loops = 10_000_000
pprint(('C1', timeit.timeit(stmt='C1()', setup="from __main__ import C1", number=loops)))
pprint(('C2', timeit.timeit(stmt='C2()', setup="from __main__ import C2", number=loops)))
pprint(('C3', timeit.timeit(stmt='C3(1)', setup="from __main__ import C3", number=loops)))
pprint(('C4', timeit.timeit(stmt='C4(1)', setup="from __main__ import C4", number=loops)))
pprint(('C5a', timeit.timeit(stmt='C5(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)', setup="from __main__ import C5", number=loops)))
pprint(('C5kw', timeit.timeit(stmt='C5(a=1, b=2, c=3, d=4, e=5, f=6, g=7, h=8, i=9, j=10, k=11, l=12)', setup="from __main__ import C5", number=loops)))
pprint(('C6a', timeit.timeit(stmt='C6(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)', setup="from __main__ import C6", number=loops)))
pprint(('C6kw', timeit.timeit(stmt='C6(a=1, b=2, c=3, d=4, e=5, f=6, g=7, h=8, i=9, j=10, k=11, l=12, m=13, n=14, o=15, p=16, q=17, r=18, s=19, t=20, u=21, v=22, w=23, x=24, y=25, z=26)', setup="from __main__ import C6", number=loops)))
pprint(('N1', timeit.timeit(stmt='N1(a=1)', setup="from __main__ import N1", number=loops)))
pprint(('N2a', timeit.timeit(stmt='N2(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)', setup="from __main__ import N2", number=loops)))
pprint(('N2kw', timeit.timeit(stmt='N2(a=1, b=2, c=3, d=4, e=5, f=6, g=7, h=8, i=9, j=10, k=11, l=12)', setup="from __main__ import N2", number=loops)))
pprint(('N3a', timeit.timeit(stmt='N3(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)', setup="from __main__ import N3", number=loops)))
pprint(('N3kw', timeit.timeit(stmt='N3(a=1, b=2, c=3, d=4, e=5, f=6, g=7, h=8, i=9, j=10, k=11, l=12, m=13, n=14, o=15, p=16, q=17, r=18, s=19, t=20, u=21, v=22, w=23, x=24, y=25, z=26)', setup="from __main__ import N3", number=loops)))

# Output (CPython 3.6.5 x64 on Windows 8.1):
#   (('C1', 48),                 
#    ('C2', 48),                 
#    ('C3', 48),                 
#    ('C4', 56),                 
#    ('C5', 136),                
#    ('C6', 248),                
#    ('N1', 56),                 
#    ('N2', 144),                
#    ('N3', 256))                
#   ('C1', 0.509869026157978)    
#   ('C2', 1.1899675120284186)   
#   ('C3', 1.614349688712295)    
#   ('C4', 1.8756573730015655)   
#   ('C5a', 4.753466218232507)   
#   ('C5kw', 10.637675061010755) 
#   ('C6a', 9.046176812642816)   
#   ('C6kw', 20.613434271897447) 
#   ('N1', 3.416388183739457)    
#   ('N2a', 3.9588902991877504)  
#   ('N2kw', 9.459237508635518)  
#   ('N3a', 5.912197909896207)   
#   ('N3kw', 17.366542805636286)