用于文件读取的Java中哪个API具有最佳性能？

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class FileChannelDemo {
    public static void main(String[] args) throws Exception {
        FileInputStream fis = new FileInputStream("input.txt");
        FileOutputStream fos = new FileOutputStream("output.txt");

        FileChannel inputChannel = fis.getChannel();
        FileChannel outputChannel = fos.getChannel();

        ByteBuffer buffer = ByteBuffer.allocate(1024);

        int bytesRead = inputChannel.read(buffer);
        while (bytesRead != -1) {
            buffer.flip();

            while (buffer.hasRemaining()) {
                outputChannel.write(buffer);
            }

            buffer.clear();
            bytesRead = inputChannel.read(buffer);
        }

        fis.close();
        fos.close();
    }
}