From 0662dc839f4206f26d38e78e8af8c461f73bee59 Mon Sep 17 00:00:00 2001
From: Him188 <Him188@mamoe.net>
Date: Sat, 23 Nov 2019 23:34:30 +0800
Subject: [PATCH] Enhance performance

---
 .../event/internal/InternalEventListeners.kt             | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/internal/InternalEventListeners.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/internal/InternalEventListeners.kt
index 28fd7cd4d..6d14429d5 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/internal/InternalEventListeners.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/internal/InternalEventListeners.kt
@@ -129,16 +129,15 @@ internal object EventListenerManger {
     private val registriesMutex = Mutex()
 
     @Suppress("UNCHECKED_CAST")
-    internal suspend fun <E : Subscribable> get(clazz: KClass<out E>): EventListeners<E> = registriesMutex.withLock {
-        if (registries.containsKey(clazz)) {
-            return registries[clazz] as EventListeners<E>
-        } else {
+    internal suspend fun <E : Subscribable> get(clazz: KClass<out E>): EventListeners<E> =
+        if (registries.containsKey(clazz)) registries[clazz] as EventListeners<E>
+        else registriesMutex.withLock {
             EventListeners<E>().let {
                 registries[clazz] = it
                 return it
             }
         }
-    }
+
 }
 
 internal suspend fun <E : Subscribable> E.broadcastInternal(): E {