Performance Comparison of namedtuple, namedlist, and recordclass

mutable_namedtuple_comparison.py

import sys

class Record(object):
    __slots__ = ()

    def __init__(self, *args):
        assert len(self.__slots__) == len(args)
        for field, value in zip(self.__slots__, args):
            setattr(self, field, value)

    def __getitem__(self, index):
        return getattr(self, self.__slots__[index])

    def __len__(self):
        return len(self.__slots__)

    def __eq__(self, that):
        if not isinstance(that, type(self)):
            return NotImplemented
        return all(item == iota for item, iota in zip(self, that))

    def __repr__(self):
        args = ', '.join(repr(item) for item in self)
        return '%s(%s)' % (type(self).__name__, args)

    def __getstate__(self):
        return tuple(self)

    def __setstate__(self, state):
        self.__init__(*state)

from collections import namedtuple
from namedlist import namedlist
from recordclass import recordclass

NTTest = namedtuple('NTTest', 'a b c d e f')
NLTest = namedlist('NLTest', 'a b c d e f')
RCTest = recordclass('RCTest', 'a b c d e f')

class RETest(Record):
    __slots__ = 'a', 'b', 'c', 'd', 'e', 'f'

nttest = NTTest(1, 2, 3, 4, 5, 6)
nltest = NLTest(1, 2, 3, 4, 5, 6)
rctest = RCTest(1, 2, 3, 4, 5, 6)
retest = RETest(1, 2, 3, 4, 5, 6)

print 'Attribute Access'
print 'namedtuple'
%timeit nttest.c
print 'namedlist'
%timeit nltest.c
print 'recordclass'
%timeit rctest.c
print 'Record'
%timeit retest.c

print 'Object Size'
print 'namedtuple'
print sys.getsizeof(nttest)
print 'namedlist'
print sys.getsizeof(nltest)
print 'recordclass'
print sys.getsizeof(rctest)
print 'Record'
print sys.getsizeof(retest)

print('\nAccess:')
print(f'\tnamedtuple: {exec_time(lambda: (nttest.x0, nttest.x1, nttest.x2, nttest.x3, nttest.x4, nttest.x5))}')
print(f'\tnamedlist: {exec_time(lambda: (nltest.x0, nltest.x1, nltest.x2, nltest.x3, nltest.x4, nltest.x5))}')
print(f'\trecordclass: {exec_time(lambda: (rctest.x0, rctest.x1, rctest.x2, rctest.x3, rctest.x4, rctest.x5))}')
print(f'\tstructclass: {exec_time(lambda: (sctest.x0, sctest.x1, sctest.x2, sctest.x3, sctest.x4, sctest.x5))}')
print(f'\tRecord: {exec_time(lambda: (retest.x0, retest.x1, retest.x2, retest.x3, retest.x4, retest.x5))}')

Access:
namedtuple: 621 ns
namedlist: 496 ns
recordclass: 434 ns
structclass: 481 ns
Record: 465 ns