PaperMC/patches/server/0433-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 d15d87208d21173912cf489b55b1c5d226ea998b..6f86f00d33cd50a2b67409c2f0f5400c869b802a 100644
--- a/src/main/java/net/minecraft/world/item/MapItem.java
+++ b/src/main/java/net/minecraft/world/item/MapItem.java
@@ -251,14 +251,13 @@ 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) {
-                        Biome.BiomeCategory biomebase_geography = Biome.getBiomeCategory(world.getBiome(blockposition_mutableblockposition.set((l + k1) * i, 0, (i1 + j1) * i)));
+                        Biome.BiomeCategory biomebase_geography = Biome.getBiomeCategory(world.getUncachedNoiseBiome((l + k1) * i, 0, (i1 + j1) * i)); // Paper
 
                         aboolean[j1 * 128 + k1] = biomebase_geography == Biome.BiomeCategory.OCEAN || biomebase_geography == Biome.BiomeCategory.RIVER || biomebase_geography == Biome.BiomeCategory.SWAMP;
                     }