From c8edaf1aa4c93d3fc593846842b103ab472c7dfc Mon Sep 17 00:00:00 2001
From: nostalgic853 <yuu8583@proton.me>
Date: Thu, 20 Oct 2022 23:57:33 +0800
Subject: [PATCH] Optimized Spigot event bus

---
 .../api/0001-Optimize-Spigot-event-bus.patch  | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 patches/api/0001-Optimize-Spigot-event-bus.patch

diff --git a/patches/api/0001-Optimize-Spigot-event-bus.patch b/patches/api/0001-Optimize-Spigot-event-bus.patch
new file mode 100644
index 0000000..5b76376
--- /dev/null
+++ b/patches/api/0001-Optimize-Spigot-event-bus.patch
@@ -0,0 +1,47 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Bjarne Koll <lynxplay101@gmail.com>
+Date: Thu, 9 Dec 2021 01:53:30 +0100
+Subject: [PATCH] Optimize Spigot event bus
+
+Original code by lynxplay, licensed under GNU General Public License v3.0
+You can find the original code on https://github.com/lynxplay/ktp
+
+diff --git a/src/main/java/org/bukkit/plugin/RegisteredListener.java b/src/main/java/org/bukkit/plugin/RegisteredListener.java
+index 419aec56b0e3fa8bcec2ea7f340caa3456b57d00..8530d926931a54ed1300c40cd1e0908b2d9b594d 100644
+--- a/src/main/java/org/bukkit/plugin/RegisteredListener.java
++++ b/src/main/java/org/bukkit/plugin/RegisteredListener.java
+@@ -62,8 +62,10 @@ public class RegisteredListener {
+      * @throws EventException If an event handler throws an exception.
+      */
+     public void callEvent(@NotNull final Event event) throws EventException {
+-        if (event instanceof Cancellable) {
+-            if (((Cancellable) event).isCancelled() && isIgnoringCancelled()) {
++        // KTP start - optimize spigot event bus
++        if (isIgnoringCancelled()) {
++            if (event instanceof Cancellable cancellable && cancellable.isCancelled()) {
++        // KTP end - optimize spigot event bus
+                 return;
+             }
+         }
+diff --git a/src/main/java/org/bukkit/plugin/SimplePluginManager.java b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
+index 6bb115923767c4bd65b18e67eeff5408f2894ab0..b0e11ed48e06abd585bd9dded52945562a8c6830 100644
+--- a/src/main/java/org/bukkit/plugin/SimplePluginManager.java
++++ b/src/main/java/org/bukkit/plugin/SimplePluginManager.java
+@@ -660,11 +660,15 @@ public final class SimplePluginManager implements PluginManager {
+     @Override
+     public void callEvent(@NotNull Event event) {
+         // Paper - replace callEvent by merging to below method
+-        if (event.isAsynchronous() && server.isPrimaryThread()) {
++        // KTP start - optimize spigot event bus
++        final boolean isAsync = event.isAsynchronous();
++        final boolean isPrimary = server.isPrimaryThread(); // Cache to prevent multiple thread object comparisons.
++        if (isAsync && isPrimary) {
+             throw new IllegalStateException(event.getEventName() + " may only be triggered asynchronously.");
+-        } else if (!event.isAsynchronous() && !server.isPrimaryThread() && !server.isStopping() ) {
++        } else if (!isAsync && !isPrimary && !server.isStopping() ) {
+             throw new IllegalStateException(event.getEventName() + " may only be triggered synchronously.");
+         }
++        // KTP end - optimize spigot event bus
+ 
+         HandlerList handlers = event.getHandlers();
+         RegisteredListener[] listeners = handlers.getRegisteredListeners();