type Metrics struct {
    AverageLatency float64
    RequestCount   int64
    ErrorCount     int64
}

func AverageLatency(host string) Metrics {
    REQUESTS_LIMIT := 100
    var errors int64
    results := make([]int64, 0, DEFAULT_REQUESTS_LIMIT)

    var wg sync.WaitGroup
    wg.Add(REQUESTS_LIMIT)

    for j := 0; j < REQUESTS_LIMIT; j++ {
        go func() {
            defer wg.Done()
            start := time.Now()
            if _, err := net.LookupHost(host); err != nil {
                fmt.Printf("%s", err.Error())
                atomic.AddInt64(&errors, 1)
                return
            }
            append(results, time.Since(start).Nanoseconds() / int64(time.Millisecond))
        }
    }

    wg.Wait()

    return CalculateStats(&results, &errors)
}