msgpack .. speed kills

from msgpack import packs, unpacks
from simplejson import dumps, loads

d = {'x':range(100), 'y':{'abc':'def'}, 'zero':None}
d['x'].append('a')

import time

def time_msgpack():
    stime = time.time()
    for i in range(1000):
        assert unpacks(packs(d)) == d
    print time.time()-stime

def time_json():
    stime = time.time()
    for i in range(1000):
        assert loads(dumps(d)) == d
    print time.time()-stime

if __name__ == '__main__':
    time_msgpack()
    time_json()