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 27862f85307e2de5f3fe2195b62a1a9bd3f496de..602e6bc05c053baf821c11c30b24538320b9ac61 100644
--- a/src/main/java/net/minecraft/world/item/MapItem.java
+++ b/src/main/java/net/minecraft/world/item/MapItem.java
@@ -256,7 +256,7 @@ public class MapItem extends ComplexItem {
 
                 for (l = 0; l < 128 * i; ++l) {
                     for (i1 = 0; i1 < 128 * i; ++i1) {
-                        Biome.BiomeCategory biomebase_geography = world.getBiome(new BlockPos((j / i - 64) * i + i1, 0, (k / i - 64) * i + l)).getBiomeCategory();
+                        Biome.BiomeCategory biomebase_geography = world.getUncachedNoiseBiome((j / i - 64) * i + i1, 0, (k / i - 64) * i + l).getBiomeCategory(); // Paper
 
                         aboolean[l * 128 * i + i1] = biomebase_geography == Biome.BiomeCategory.OCEAN || biomebase_geography == Biome.BiomeCategory.RIVER || biomebase_geography == Biome.BiomeCategory.SWAMP;
                     }