Source Code : Comparing Buffered and Unbuffered Writing Performance

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Comparing Buffered and Unbuffered Writing Performance

import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Date;

public class BufferDiff {
  public static void main(String args[]) throws IOException {
    FileOutputStream unbufStream;
    BufferedOutputStream bufStream;
    unbufStream = new FileOutputStream("test.one");
    bufStream = new BufferedOutputStream(new FileOutputStream("test.two"));
    System.out.println("Write file unbuffered: " + time(unbufStream) + "ms");
    System.out.println("Write file  buffered: " + time(bufStream) + "ms");
  }

  static int time(OutputStream os) throws IOException {
    Date then = new Date();
    for (int i = 0; i < 500000; i++) {
      os.write(1);
    }
    os.close();
    return (int) ((new Date()).getTime() - then.getTime());
  }
}
           
       

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