gistfile1.txt

from __future__ import division

from threading import Thread
from array import array
from sys import argv


data = array('B')

with open('/dev/urandom') as f:
        data.fromfile(f, 1 << 26)


def add(start, stop):
        acc = 0
        for i in range(start, stop):
                acc += data[i]

        return acc


if __name__ == '__main__':
        opt = int(argv[1])

        if opt == 0:
                print add(0, len(data))
        else:
                import time
                start = time.time()
                chunk = len(data) / opt
                threads = [Thread(target=add, args=(int(i * chunk), int((i + 1) * chunk))) for i in range(opt)]
                for t in threads:
                        t.start()
                for t in threads:
                        t.join()
                print time.time() - start



(tmp)squeaky@tannit:~$ /home/arigo/br/stmgc-c7/64compiled/pypy-c-r70087-stm test.py 1
18.977668047
(tmp)squeaky@tannit:~$ /home/arigo/br/stmgc-c7/64compiled/pypy-c-r70087-stm test.py 2
18.948595047