Paper/patches/unapplied/server/0389-Use-seed-based-lookup-for-Treasure-Maps-Fixes-lag-fr.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Sun, 7 Jun 2020 19:25:13 -0400
Subject: [PATCH] Use seed based lookup for Treasure Maps - Fixes lag from
 carto/sunken maps


diff --git a/src/main/java/net/minecraft/world/item/MapItem.java b/src/main/java/net/minecraft/world/item/MapItem.java
index e46ceae916f6396d96226db6d8e90bd29088f765..f643d3c06bd8fc37f6c571a19d5691694b0ce8d3 100644
--- a/src/main/java/net/minecraft/world/item/MapItem.java
+++ b/src/main/java/net/minecraft/world/item/MapItem.java
@@ -242,14 +242,13 @@ public class MapItem extends ComplexItem {
                 boolean[] aboolean = new boolean[16384];
                 int l = j / i - 64;
                 int i1 = k / i - 64;
-                BlockPos.MutableBlockPos blockposition_mutableblockposition = new BlockPos.MutableBlockPos();
 
                 int j1;
                 int k1;
 
                 for (j1 = 0; j1 < 128; ++j1) {
                     for (k1 = 0; k1 < 128; ++k1) {
-                        Holder<Biome> holder = world.getBiome(blockposition_mutableblockposition.set((l + k1) * i, 0, (i1 + j1) * i));
+                        Holder<Biome> holder = world.getUncachedNoiseBiome((l + k1) * i, 0, (i1 + j1) * i); // Paper - Perf: Use seed based lookup for treasure maps
 
                         aboolean[j1 * 128 + k1] = holder.is(BiomeTags.WATER_ON_MAP_OUTLINES);
                     }