Python equality test for old vs new objects

benchmark.py

import cProfile
import pstats
from random import random


class SampleObject:
    def __init__(self):
        self.sample_data = random()

class SampleObjectNew(object):
    def __init__(self):
        self.sample_data = random()



old_objects = [SampleObject() for _ in xrange(3000)]
new_objects = [SampleObjectNew() for _ in xrange(len(old_objects))]


def compare_with_id(l):
    for a in l:
        for b in l:
            equal = id(a)==id(b)

def compare_with_equality(l):
    for a in l:
        for b in l:
            equal = a==b



for sample_list in (old_objects, new_objects):
    print "Testing performance for type", sample_list[0].__class__.__name__

    p = cProfile.Profile()
    p.enable()


    compare_with_id(sample_list)
    compare_with_equality(sample_list)

    p.disable()

    sortby = 'cumulative'
    ps = pstats.Stats(p).sort_stats(sortby)
    ps.print_stats()

sample output.txt

Testing performance for type SampleObject
         18000003 function calls in 17.105 seconds

   Ordered by: cumulative time

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1   14.528   14.528   14.528   14.528 benchmark.py:25(compare_with_equality)
        1    1.890    1.890    2.576    2.576 benchmark:20(compare_with_id)
 18000000    0.687    0.000    0.687    0.000 {id}
        1    0.000    0.000    0.000    0.000 {method 'disable' of '_lsprof.Profiler' objects}


Testing performance for type SampleObjectNew
         18000003 function calls in 2.984 seconds

   Ordered by: cumulative time

   ncalls  tottime  percall  cumtime  percall filename:lineno(function)
        1    1.884    1.884    2.567    2.567 benchmark.py:20(compare_with_id)
 18000000    0.683    0.000    0.683    0.000 {id}
        1    0.417    0.417    0.417    0.417 benchmark.py:25(compare_with_equality)
        1    0.000    0.000    0.000    0.000 {method 'disable' of '_lsprof.Profiler' objects}