benchmark.py

import time
import os

DATA = 'aaaaaaaaaabbbbbbbbbbccccccccccdddddddddd'*100000


def main():
    with open('/tmp/test.log', 'w') as f:
        for i in xrange(1000):
            start_at = time.time()
            f.write(DATA)
            f.flush()
            os.fsync(f.fileno())
            print  '{0:>10}\t{1:d}'.format(i, int((time.time() - start_at)*1000))


if __name__ == '__main__':
    main()