part.java

  @Test
  public void speedTest() {
    int n = 500;
    int oneBuffSize = 100000;
    System.out.println("n = " + n);

    byte buffArray[][] = new byte[n][];
    for (int j = 0; j < n; j++) {
      byte buff0[] = new byte[oneBuffSize];
      for (int i = 0; i < oneBuffSize; i++) {
        buff0[i] = (byte) (i % 12);
      }
      buffArray[j] = buff0;
    }

    System.out.println("duration221 = " + durationOfSend(n, Unpooled.wrappedBuffer(buffArray), oneBuffSize));
    System.out.println("duration221.new = " + durationOfNewSend(n, Unpooled.wrappedBuffer(buffArray), oneBuffSize));

    System.out.println("duration230 = " + durationOfSend(n, Unpooled.wrappedBuffer(n, buffArray), oneBuffSize));
    System.out.println("duration230.new = " + durationOfNewSend(n, Unpooled.wrappedBuffer(n, buffArray), oneBuffSize));
  }

  private long durationOfSend(int n, ByteBuf bb, int oneBuffSize) {
    long start = System.currentTimeMillis();
    for (int j = 0; j < n; j++) {
      bb.nioBuffer();
      bb.skipBytes(oneBuffSize);
    }
    return System.currentTimeMillis() - start;
  }


  private long durationOfNewSend(int n, ByteBuf bb, int oneBuffSize) {
    long start = System.currentTimeMillis();
    for (int j = 0; j < n; j++) {
      bb.nioBuffer(0, oneBuffSize-1);
      bb.skipBytes(oneBuffSize);
    }
    return System.currentTimeMillis() - start;
  }