IO performance test

iotest.py

import os
import random
import timeit


def random_content():
    return os.urandom(random.randint(1, 10) * 1024)


file = open('test.db', 'wb')
fd = file.fileno()

contents = [random_content() for i in range(10)]


def sequence_write():
    for data in contents:
        os.write(fd, data)
        os.fsync(fd)


def batch_write():
    for data in contents:
        os.write(fd, data)
    os.fsync(fd)


def main():
    print(timeit.timeit(sequence_write, number=1000))
    print(timeit.timeit(batch_write, number=1000))


if __name__ == "__main__":
    main()