sort_lambda_or_itemgetter.py

#!/usr/bin/env python
# Benchmark: lambda vs. operator.itemgetter

from datetime import datetime
from random import randint
from timeit import Timer

def create_random_datetime_dict():
    return [(i, datetime.fromtimestamp(randint(1230768000, 1262303999)))
            for i in xrange(200000)]

if __name__=='__main__':
    #t1 = Timer("items=create_random_datetime_dict(); items.sort(key=lambda item: item['date'])",
    #           "from __main__ import create_random_datetime_dict")
    #print t1.timeit(10)
    t2 = Timer("items=create_random_datetime_dict(); items.sort(key=itemgetter(1))",
               "from __main__ import create_random_datetime_dict; from operator import itemgetter")
    print t2.timeit(25)