package main import ( "fmt" "sync" "time" ) func main() { obj := sync.Map{} for i := 0; i < 4; i++ { go func() { for { obj.Store("num", i) } }() } time.Sleep(time.Second * 10) res, _ := obj.Load("num") fmt.Println("ops:", res) }package main import ( "fmt" "sync/atomic" "time" ) func main() { var ops uint64 = 0 iters := 4 for i := 0; i < iters; i++ { go func() { for { atomic.AddUint64(&ops, 1) // return <- uncomment this } }() } time.Sleep(time.Second * 1) opsFinal := atomic.LoadUint64(&ops) fmt.Println("ops:", opsFinal) }