From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: NONPLAYT <76615486+NONPLAYT@users.noreply.github.com>
Date: Mon, 26 May 2025 02:02:57 +0300
Subject: [PATCH] Optimization for HandlerList and Event#callEvent


diff --git a/src/main/java/org/bukkit/event/Event.java b/src/main/java/org/bukkit/event/Event.java
index 7fd1f4b59584d840759e6c100743d646cb98348e..99c73966b63c74bc8c675de4073e601f09ae0eec 100644
--- a/src/main/java/org/bukkit/event/Event.java
+++ b/src/main/java/org/bukkit/event/Event.java
@@ -43,6 +43,7 @@ public abstract class Event {
      * @return {@code false} if event was cancelled, if cancellable. otherwise {@code true}.
      */
     public boolean callEvent() {
+        if (!getHandlers().hasRegisteredListeners()) return true; // DivineMC - Optimization for HandlerList and Event#callEvent
         Bukkit.getPluginManager().callEvent(this);
         if (this instanceof Cancellable) {
             return !((Cancellable) this).isCancelled();
diff --git a/src/main/java/org/bukkit/event/HandlerList.java b/src/main/java/org/bukkit/event/HandlerList.java
index ef9d9f3ddaf25aa990715139e1916672f76c35e5..3f61b6daca72f1949d35c3adade5a7fec96fc3d9 100644
--- a/src/main/java/org/bukkit/event/HandlerList.java
+++ b/src/main/java/org/bukkit/event/HandlerList.java
@@ -244,4 +244,16 @@ public class HandlerList {
             return (ArrayList<HandlerList>) allLists.clone();
         }
     }
+
+    // DivineMC start - Optimization for HandlerList and Event#callEvent
+    /**
+     * Checks if this HandlerList has any registered listeners.
+     *
+     * @return true if there are registered listeners, false otherwise
+     * @apiNote if length is less than 0 or null, it has no listeners
+     */
+    public boolean hasRegisteredListeners() {
+        return this.handlers != null && this.handlers.length > 0;
+    }
+    // DivineMC end - Optimization for HandlerList and Event#callEvent
 }