1 files changed, 27 insertions, 0 deletions
diff --git a/patches/server/0434-Use-seed-based-lookup-for-Treasure-Maps-Fixes-lag-fr.patch b/patches/server/0434-Use-seed-based-lookup-for-Treasure-Maps-Fixes-lag-fr.patch
new file mode 100644
index 0000000000..3c0b925e52
--- /dev/null
+++ b/patches/server/0434-Use-seed-based-lookup-for-Treasure-Maps-Fixes-lag-fr.patch
@@ -0,0 +1,27 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Aikar <[email protected]>
+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;
+                     }