--- a/net/minecraft/world/item/MapItem.java
+++ b/net/minecraft/world/item/MapItem.java
@@ -99,8 +_,8 @@
                             int i9 = (i1 / i + i6 - 64) * i;
                             int i10 = (i2 / i + i7 - 64) * i;
                             Multiset<MapColor> multiset = LinkedHashMultiset.create();
-                            LevelChunk chunk = level.getChunk(SectionPos.blockToSectionCoord(i9), SectionPos.blockToSectionCoord(i10));
-                            if (!chunk.isEmpty()) {
+                            LevelChunk chunk = level.getChunkIfLoaded(SectionPos.blockToSectionCoord(i9), SectionPos.blockToSectionCoord(i10)); // Paper - Maps shouldn't load chunks
+                            if (chunk != null && !chunk.isEmpty()) { // Paper - Maps shouldn't load chunks
                                 int i11 = 0;
                                 double d1 = 0.0;
                                 if (level.dimensionType().hasCeiling()) {
@@ -207,7 +_,7 @@
 
                 for (int i5 = 0; i5 < 128; i5++) {
                     for (int i6 = 0; i6 < 128; i6++) {
-                        Holder<Biome> biome = serverLevel.getBiome(mutableBlockPos.set((i3 + i6) * i, 0, (i4 + i5) * i));
+                        Holder<Biome> biome = serverLevel.getUncachedNoiseBiome((i3 + i6) * i, 0, (i4 + i5) * i); // Paper - Perf: Use seed based lookup for treasure maps
                         flags[i5 * 128 + i6] = biome.is(BiomeTags.WATER_ON_MAP_OUTLINES);
                     }
                 }