Use tickers instead of time.Sleep(), simplify main loop condition

internal/lib/la.go

@@ -9,7 +9,19 @@ import (
 
 // UpdateLaStats вытаскивает показание LA за последнюю минуту.
 func (c *MyConfig) UpdateLaStats() {
-	for {
+	var (
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = 3 * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
+	)
+
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
 		l, _ := load.Avg()
 
 		lav := fmt.Sprintf("%.2f", l.Load1)
@@ -18,7 +30,5 @@ func (c *MyConfig) UpdateLaStats() {
 			c.Values.La = lav
 			c.Channels.UpdateReady <- true
 		}
-
-		time.Sleep(3 * time.Second)
 	}
 }