Skip events without listeners

patches/api/0005-Skip-events-without-listeners.patch

@@ -0,0 +1,42 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: MartijnMuijsers <martijnmuijsers@live.nl>
+Date: Thu, 1 Dec 2022 13:45:13 +0100
+Subject: [PATCH] Skip events without listeners
+
+License: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
+
+This patch is based on the following patch:
+"skip event if no listeners"
+By: Simon Gardling <titaniumtown@gmail.com>
+As part of: JettPack (https://gitlab.com/Titaniumtown/JettPack)
+Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)
+
+diff --git a/src/main/java/org/bukkit/plugin/SimplePluginManager.java b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
+index 9db611841b73fed8dc8a71f4d7fdef95af3cf89d..7edbcee946bb310bba54720cd47cd21f0a36276d 100644
+--- a/src/main/java/org/bukkit/plugin/SimplePluginManager.java
++++ b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
+@@ -651,6 +651,14 @@ public final class SimplePluginManager implements PluginManager {
+      */
+     @Override
+     public void callEvent(@NotNull Event event) {
++        // Gale start - JettPack - skip events without listeners
++        HandlerList handlers = event.getHandlers();
++        RegisteredListener[] listeners = handlers.getRegisteredListeners();
++        if (listeners.length == 0) {
++            return;
++        }
++        // Gale end - JettPack - skip events without listeners
++
+         // Paper - replace callEvent by merging to below method
+         if (event.isAsynchronous() && server.isPrimaryThread()) {
+             throw new IllegalStateException(event.getEventName() + " may only be triggered asynchronously.");
+@@ -658,9 +666,6 @@ public final class SimplePluginManager implements PluginManager {
+             throw new IllegalStateException(event.getEventName() + " may only be triggered synchronously.");
+         }
+ 
+-        HandlerList handlers = event.getHandlers();
+-        RegisteredListener[] listeners = handlers.getRegisteredListeners();
+-
+         for (RegisteredListener registration : listeners) {
+             if (!registration.getPlugin().isEnabled()) {
+                 continue;