pyuv loop.stop() vs custom loop

i1.py

import pyuv

N = 1000000

def idle_cb(handle):
    handle.count += 1
    if handle.count == N:
        handle.loop.stop()

loop = pyuv.Loop()
idle = pyuv.Idle(loop)
idle.count = 0
idle.start(idle_cb)

loop.run()

print idle.count

i1.txt

(master)(pyuv27)saghul@hal:~/src/pyuv
$ time python i1.py 
1000000

real    0m2.408s
user    0m1.638s
sys     0m0.611s
(master)(pyuv27)saghul@hal:~/src/pyuv
$ time python i1.py 
1000000

real    0m2.342s
user    0m1.641s
sys     0m0.618s
(master)(pyuv27)saghul@hal:~/src/pyuv
$ time python i1.py 
1000000

real    0m2.384s
user    0m1.623s
sys     0m0.610s
(master)(pyuv27)saghul@hal:~/src/pyuv
$ 

i2.py

import pyuv

N = 1000000
stop = False

def idle_cb(handle):
    handle.count += 1
    if handle.count == N:
        global stop
        stop = True

loop = pyuv.Loop()
idle = pyuv.Idle(loop)
idle.count = 0
idle.start(idle_cb)

while not stop and loop.run(pyuv.UV_RUN_ONCE):
    pass

print idle.count

i2.txt

(master)(pyuv27)saghul@hal:~/src/pyuv
$ time python i2.py                                                                                                                                                                                                                           
1000000

real    0m3.572s
user    0m2.703s
sys     0m0.720s
(master)(pyuv27)saghul@hal:~/src/pyuv
$ time python i2.py 
1000000

real    0m3.515s
user    0m2.713s
sys     0m0.720s
(master)(pyuv27)saghul@hal:~/src/pyuv
$ time python i2.py 
1000000

real    0m3.647s
user    0m2.714s
sys     0m0.724s
(master)(pyuv27)saghul@hal:~/src/pyuv
$