code: func (cs *ConnStats) AvgRPCTime() time.Duration {
  	return time.Duration(float64(cs.RPCTime)/float64(cs.RPCCalls)) * time.Millisecond
  }
docs: // AvgRPCTime returns the average RPC execution time.
  //
  // Use stats returned from ConnStats.Snapshot() on live Client and / or Server,
  // since the original stats can be updated by concurrently running goroutines.