toruw

import mmap,time
def test_io():
    f = open('test.dat','r+b',0)
    start = time.time()
    i = 0
    while i < 1000000:
        f.read()
        i += 1
    end = time.time()
    print("test_io: %s ms" % ((end - start)*1000))

toruw

import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel.MapMode;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class IOPerfTest {