event: initialize maps with known size (#27233)

event: initialize maps with known size

event: initialize maps with known size (#27233)
event: initialize maps with known size
0fb1be09 · ucwong · GitHub · c62da24d · 0fb1be09
Unverified Commit 0fb1be09 authored May 09, 2023 by ucwong Committed by GitHub May 09, 2023
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event.go event/event.go +1 -1

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--- 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)