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path: root/patches/server/0986-Cache-map-ids-on-item-frames.patch
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Warrior <50800980+Warriorrrr@users.noreply.github.com>
Date: Mon, 7 Aug 2023 12:58:28 +0200
Subject: [PATCH] Cache map ids on item frames


diff --git a/src/main/java/net/minecraft/server/level/ServerEntity.java b/src/main/java/net/minecraft/server/level/ServerEntity.java
index 625a598eb5f3c9c5ea60ae9ea50974bb08abbf85..9f1b424f8437f0f859d4f177ecc52233ad8e3357 100644
--- a/src/main/java/net/minecraft/server/level/ServerEntity.java
+++ b/src/main/java/net/minecraft/server/level/ServerEntity.java
@@ -118,7 +118,7 @@ public class ServerEntity {
                 ItemStack itemstack = entityitemframe.getItem();
 
                 if (this.level.paperConfig().maps.itemFrameCursorUpdateInterval > 0 && this.tickCount % this.level.paperConfig().maps.itemFrameCursorUpdateInterval == 0 && itemstack.getItem() instanceof MapItem) { // CraftBukkit - Moved this.tickCounter % 10 logic here so item frames do not enter the other blocks // Paper - Make item frame map cursor update interval configurable
-                    Integer integer = MapItem.getMapId(itemstack);
+                    Integer integer = entityitemframe.cachedMapId; // Paper
                     MapItemSavedData worldmap = MapItem.getSavedData(integer, this.level);
 
                     if (worldmap != null) {
diff --git a/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java b/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java
index dcf245387f59ce730cb2cfb5fc0e837a20d3dfe5..759ecd79534a7706f7d4a63eb9dacbefcfe54674 100644
--- a/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java
+++ b/src/main/java/net/minecraft/world/entity/decoration/ItemFrame.java
@@ -50,6 +50,7 @@ public class ItemFrame extends HangingEntity {
     public static final int NUM_ROTATIONS = 8;
     public float dropChance;
     public boolean fixed;
+    public Integer cachedMapId; // Paper
 
     public ItemFrame(EntityType<? extends ItemFrame> type, Level world) {
         super(type, world);
@@ -393,6 +394,7 @@ public class ItemFrame extends HangingEntity {
     }
 
     private void onItemChanged(ItemStack stack) {
+        this.cachedMapId = MapItem.getMapId(stack); // Paper
         if (!stack.isEmpty() && stack.getFrame() != this) {
             stack.setEntityRepresentation(this);
         }