code: @Override
    public void write(int b) throws IOException {
      long startTime = System.nanoTime();
      out.write(b);
      statistics.incrementBytesWritten(1);
      long duration = System.nanoTime() - startTime;
      ghfs.increment(GoogleHadoopFileSystemBase.Counter.WRITE1);
      ghfs.increment(GoogleHadoopFileSystemBase.Counter.WRITE1_TIME, duration);
    }
docs: Writes the specified byte to this output stream.