code: private static void writeToLog(int level, long totalNanos, long count, ProfilingTimerNode parent, String taskName, Log log, String logAppendMessage) {
  		if (log == null) {
  			return;
  		}
  
  		StringBuilder sb = new StringBuilder();
  		for (int i = 0; i < level; i++) {
  			sb.append('\t');
  		}
  		String durationText = String.format("%s%s",
  				formatElapsed(totalNanos),
  				count == 1 ?
  						"" :
  						String.format(" across %d invocations, average: %s", count, formatElapsed(totalNanos / count)));
  		String text = parent == null ?
  				String.format("total time %s", durationText) :
  				String.format("[%s] took %s", taskName, durationText);
  		sb.append(text);
  		sb.append(logAppendMessage);
  		log.info(sb.toString());
  	}
docs: Writes one profiling line of information to the log