event: initialize maps with known size (ethereum#27233)

event: initialize maps with known size
shekhirin · Jun 6, 2023 · ab40fad · ab40fad
1 parent cc9d380
commit ab40fad
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/event/event.go b/event/event.go
@@ -61,7 +61,7 @@ func (mux *TypeMux) Subscribe(types ...interface{}) *TypeMuxSubscription {
 		close(sub.postC)
 	} else {
 		if mux.subm == nil {
-			mux.subm = make(map[reflect.Type][]*TypeMuxSubscription)
+			mux.subm = make(map[reflect.Type][]*TypeMuxSubscription, len(types))
 		}
 		for _, t := range types {
 			rtyp := reflect.TypeOf(t)