adds matchingListenersCalls counter

emberjs · Oct 17, 2018 · 4e24e8e · 4e24e8e
1 parent ef21456
commit 4e24e8e
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/packages/@ember/-internals/meta/lib/meta.ts b/packages/@ember/-internals/meta/lib/meta.ts
@@ -12,6 +12,7 @@ export interface MetaCounters {
   deleteCalls: number;
   metaCalls: number;
   metaInstantiated: number;
+  matchingListenersCalls: number;
   addToListenersCalls: number;
   removeFromListenersCalls: number;
   removeAllListenersCalls: number;
@@ -28,6 +29,7 @@ if (DEBUG) {
     deleteCalls: 0,
     metaCalls: 0,
     metaInstantiated: 0,
+    matchingListenersCalls: 0,
     addToListenersCalls: 0,
     removeFromListenersCalls: 0,
     removeAllListenersCalls: 0,
@@ -723,6 +725,10 @@ export class Meta {
   matchingListeners(eventName: string): (string | boolean | object | null)[] | undefined | void {
     let listeners = this.flattenedListeners();
 
+    if (DEBUG) {
+      counters!.matchingListenersCalls++;
+    }
+
     if (listeners !== undefined) {
       let result = [];