Refactor loopTicker to use time.Sleep instead to prevent high CPU usage

cmd/main.go

@@ -28,7 +28,7 @@ const (
 	unassignTimeout                 = 5 * time.Minute
 	kubeipLockName                  = "kubeip-lock"
 	defaultLeaseDuration            = 5
-	loopInterval                    = 250 * time.Millisecond
+	pauseInterval                   = 3 * time.Second
 )
 
 var (
@@ -179,10 +179,6 @@ func run(c context.Context, log *logrus.Entry, cfg *config.Config) error {
 		}
 	}()
 
-	// Create a ticker for non-blocking delay
-	loopTicker := time.NewTicker(loopInterval)
-	defer loopTicker.Stop()
-
 	for {
 		select {
 		case assignErr, ok := <-errorCh:
@@ -208,9 +204,8 @@ func run(c context.Context, log *logrus.Entry, cfg *config.Config) error {
 				log.Infof("static public IP address released")
 			}
 			return nil
-		case <-loopTicker.C:
-			// Wait for the next tick before continuing the loop
-			// This case prevents high CPU usage by introducing a non-blocking delay
+		default:
+			time.Sleep(pauseInterval)
 		}
 	}
 }