code: func NewQueryStats(tg *QueryTimers) *QueryStats {
  	var qt queryTimings
  
  	for s, timer := range tg.TimerGroup.timers {
  		switch s {
  		case EvalTotalTime:
  			qt.EvalTotalTime = timer.Duration()
  		case ResultSortTime:
  			qt.ResultSortTime = timer.Duration()
  		case QueryPreparationTime:
  			qt.QueryPreparationTime = timer.Duration()
  		case InnerEvalTime:
  			qt.InnerEvalTime = timer.Duration()
  		case ExecQueueTime:
  			qt.ExecQueueTime = timer.Duration()
  		case ExecTotalTime:
  			qt.ExecTotalTime = timer.Duration()
  		}
  	}
  
  	qs := QueryStats{Timings: qt}
  	return &qs
  }
docs: // NewQueryStats makes a QueryStats struct with all QueryTimings found in the
  // given TimerGroup.