code: func incRequests() {
  	stats.TotalRequestRate.Mark(1)
  	eCtr := float64(stats.ErrorRate.Count())
  	rCtr := float64(stats.TotalRequestRate.Count())
  	stats.ErrorPercent.Update(eCtr / rCtr * 100)
  }
docs: // incRequests increments the request count and updates the error percentage.