   }
   stop = RTC::micros();
   ns = (stop - start) / 1000L;
-  INFO("byte data transfer() pin.write(data,clk):%ul ns", ns);
+  INFO("write serial(8):pin.write(data,clk):%ul ns", ns);
   
   start = RTC::micros();
   for (uint16_t i = 0; i < 1000; i++) {


  stop = RTC::micros();
  ns = (stop - start) / 1000L;
  INFO("byte data transfer() pin.write/toggle() unrolled:%ul ns\n", ns);

  // Measure the time to perform 1,000 analog pin samples
  start = RTC::micros();

    }
  stop = RTC::micros();
  ns = (stop - start) / 1000L;
  INFO("nop:%ul ns\n", ns);

  // Measure the time to perform 1,000,000 input pin reads
  cnt = 0;
