1 files changed, 39 insertions, 0 deletions
diff --git a/patches/server/0906-Cache-map-ids-on-item-frames.patch b/patches/server/0906-Cache-map-ids-on-item-frames.patch
new file mode 100644
index 0000000000..a65e4d7021
--- /dev/null
+++ b/patches/server/0906-Cache-map-ids-on-item-frames.patch
@@ -0,0 +1,39 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Warrior <[email protected]>
+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 1f0931bdd4d82c05d7b5f8b8e5c2cc6d23905c73..da45984c9b2d3a55256efddde94580505f692655 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 - Perf: Cache map ids on item frames
+                     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 0cd57021cf308984415ca670f727ae61ac343fe7..80303f9466b8c7097151be313afc9a383693d18a 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 - Perf: Cache map ids on item frames
+ 
+     public ItemFrame(EntityType<? extends ItemFrame> type, Level world) {
+         super(type, world);
+@@ -388,6 +389,7 @@ public class ItemFrame extends HangingEntity {
+     }
+ 
+     private void onItemChanged(ItemStack stack) {
++        this.cachedMapId = MapItem.getMapId(stack); // Paper - Perf: Cache map ids on item frames
+         if (!stack.isEmpty() && stack.getFrame() != this) {
+             stack.setEntityRepresentation(this);
+         }