chore: add some annotations (#1544)

ref: #1075 
because I am not a native English, maybe have a bit problem.

examples/realtime-advanced/main.go

@@ -13,16 +13,19 @@ func main() {
 	StartGin()
 }
 
+// ConfigRuntime sets the number of operating system threads.
 func ConfigRuntime() {
 	nuCPU := runtime.NumCPU()
 	runtime.GOMAXPROCS(nuCPU)
 	fmt.Printf("Running with %d CPUs\n", nuCPU)
 }
 
+// StartWrokers start starsWorker by goroutine.
 func StartWorkers() {
 	go statsWorker()
 }
 
+// StartGin starts gin web server with setting router.
 func StartGin() {
 	gin.SetMode(gin.ReleaseMode)
 

examples/realtime-advanced/stats.go

@@ -50,6 +50,7 @@ func connectedUsers() uint64 {
 	return uint64(connected)
 }
 
+// Stats returns savedStats data.
 func Stats() map[string]uint64 {
 	mutexStats.RLock()
 	defer mutexStats.RUnlock()