Change flap detection configuration (#914)

* Change flap detection configuration

* Make PenaltyHalfLife a float, not int 🤦‍♂️

* Lower event suppression to 200

router/default.go

@@ -21,15 +21,15 @@ const (
 	// AdvertiseFlushTick is time the yet unconsumed advertisements are flush i.e. discarded
 	AdvertiseFlushTick = 15 * time.Second
 	// AdvertSuppress is advert suppression threshold
-	AdvertSuppress = 2000.0
+	AdvertSuppress = 200.0
 	// AdvertRecover is advert recovery threshold
-	AdvertRecover = 500.0
+	AdvertRecover = 120.0
 	// DefaultAdvertTTL is default advertisement TTL
 	DefaultAdvertTTL = 1 * time.Minute
 	// Penalty for routes processed multiple times
-	Penalty = 2000.0
+	Penalty = 100.0
 	// PenaltyHalfLife is the time the advert penalty decays to half its value
-	PenaltyHalfLife = 2.5
+	PenaltyHalfLife = 30.0
 	// MaxSuppressTime defines time after which the suppressed advert is deleted
 	MaxSuppressTime = 5 * time.Minute
 )
@@ -396,22 +396,25 @@ func (r *router) advertiseEvents() error {
 					advert.isSuppressed = false
 				}
 
-				// max suppression time threshold has been reached, delete the advert
 				if advert.isSuppressed {
+					// max suppression time threshold has been reached, delete the advert
 					if time.Since(advert.suppressTime) > MaxSuppressTime {
 						delete(advertMap, key)
 						continue
 					}
+					// process next advert
+					continue
 				}
 
-				if !advert.isSuppressed {
+				// copy the event and append
 				e := new(Event)
+				// this is ok, because router.Event only contains builtin types
+				// and no references so this creates a deep struct copy of Event
 				*e = *(advert.event)
 				events = append(events, e)
 				// delete the advert from the advertMap
 				delete(advertMap, key)
 			}
-			}
 
 			// advertise all Update events to subscribers
 			if len(events) > 0 {