From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: nostalgic853 <yuu8583@proton.me>
Date: Mon, 24 Oct 2022 11:01:36 +0800
Subject: [PATCH] Skip entity move if no movement

Copyright (c) 2021-2022 ishland

Original code by RelativityMC, licensed under MIT
You can find the original code on https://github.com/RelativityMC/VMP-fabric (Yarn mappings)

diff --git a/src/main/java/net/minecraft/world/entity/Entity.java b/src/main/java/net/minecraft/world/entity/Entity.java
index 7ef574008f413008427d075860c9eb5debeef4f4..83eece9c61f8316221a304f3dd69a7fe3cce3727 100644
--- a/src/main/java/net/minecraft/world/entity/Entity.java
+++ b/src/main/java/net/minecraft/world/entity/Entity.java
@@ -399,6 +399,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     private UUID originWorld;
     public boolean freezeLocked = false; // Paper - Freeze Tick Lock API
     public @Nullable Boolean immuneToFire = null; // Purpur - Fire immune API
+    private boolean boundingBoxChanged = false; // KeYi
 
     public void setOrigin(@javax.annotation.Nonnull Location location) {
         this.origin = location.toVector();
@@ -1035,6 +1036,13 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     // Paper end - detailed watchdog information
 
     public void move(MoverType movementType, Vec3 movement) {
+        // KeYi start
+        if (!boundingBoxChanged && movement.equals(Vec3.ZERO)) {
+            boundingBoxChanged = false;
+            return;
+        }
+        // KeYi end
+
         // Paper start - detailed watchdog information
         io.papermc.paper.util.TickThread.ensureTickThread("Cannot move an entity off-main");
         synchronized (this.posLock) {
@@ -3796,6 +3804,7 @@ public abstract class Entity implements Nameable, EntityAccess, CommandSource {
     }
 
     public final void setBoundingBox(AABB boundingBox) {
+        if (!this.bb.equals(boundingBox)) boundingBoxChanged = true; // KeYi
         // CraftBukkit start - block invalid bounding boxes
         double minX = boundingBox.minX,
                 minY = boundingBox.minY,