调优从NetworkStream读取小数据的缓冲区长度

如何在从TcpClient/networkstream读取小数据时微调bufferSize ?如果bufferSize很大，比如1024,4096，则Read/BeginRead块。如果我将bufferSize设置为16,32，它可以不阻塞地工作。

• 设置bufferSize为1保证不会有任何块吗?性能影响会非常糟糕吗?

• 看起来像将ReadTimeout设置为1000,2000这样的值对阻塞没有影响。还有其他方法可以阻塞吗是短的吗?(NoDelay = true不起作用)

  public static IObservable<byte[]> AsyncReadChunk(this Stream stream, int bufferSize)
  {
      var buffer = new byte[bufferSize];
      return Observable.FromAsyncPattern<byte[], int, int, int>(stream.BeginRead, stream.EndRead)(buffer, 0, bufferSize)
          .Select(cbRead =>
                      {
                          var dataChunk = new byte[cbRead];
                          Buffer.BlockCopy(buffer, 0, dataChunk, 0, cbRead);
                          return dataChunk;
                      });
  }
  public static IObservable<byte[]> AsyncRead(this NetworkStream stream, int bufferSize)
  {
      return Observable.Defer(() => stream.DataAvailable ? AsyncReadChunk(stream, bufferSize) : Observable.Return(new byte[0]))
          .Repeat()
          .TakeWhile((dataChunk, index) => dataChunk.Length > 0);
  }