func stats() {
    var m runtime.MemStats
    const MB = 1024 * 1024
    runtime.ReadMemStats(&m)

    fmt.Println("Sys data:")
    fmt.Printf("Obtained from system: %dMB\n", m.Sys/MB)
    fmt.Println("Pointer Lookups:", m.Lookups)
    fmt.Printf("Alloc not freed yet: %dMB\n", m.Alloc/MB)
    fmt.Printf("Total Alloc: %dMB\n", m.TotalAlloc/MB)

    fmt.Println("Garbage Collection data:")
    fmt.Println("HeapAlloc:", m.HeapAlloc)
    fmt.Println("Last time ran:", time.Unix(0, int64(m.LastGC)))
    fmt.Println("Total paused times:", m.PauseTotalNs)
    fmt.Println("Number of GC:", m.NumGC)
}