From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: HaHaWTH <102713261+HaHaWTH@users.noreply.github.com>
Date: Tue, 9 Nov 2077 00:00:00 +0800
Subject: [PATCH] Remove stream in PlacedFeature

Removed since still need to improve

Stream operation in PlacedFeature take much time generating features,
replace them with for loop uwu
Before: 3684ms
After: 673ms

diff --git a/src/main/java/net/minecraft/world/level/levelgen/placement/PlacedFeature.java b/src/main/java/net/minecraft/world/level/levelgen/placement/PlacedFeature.java
index 43ef3fdd7af5883f4846b253d76e06da0f31729e..422e9ed66052c67dab674ee548b1471307a991f5 100644
--- a/src/main/java/net/minecraft/world/level/levelgen/placement/PlacedFeature.java
+++ b/src/main/java/net/minecraft/world/level/levelgen/placement/PlacedFeature.java
@@ -41,19 +41,25 @@ public record PlacedFeature(Holder<ConfiguredFeature<?, ?>> feature, List<Placem
     }
 
     private boolean placeWithContext(PlacementContext context, RandomSource random, BlockPos pos) {
-        Stream<BlockPos> stream = Stream.of(pos);
+        // Leaf start - Remove stream in PlacedFeature
+        List<BlockPos> positions = java.util.Collections.singletonList(pos);
 
         for (PlacementModifier placementModifier : this.placement) {
-            stream = stream.flatMap(posx -> placementModifier.getPositions(context, random, posx));
+            List<BlockPos> newPositions = new java.util.ArrayList<>();
+            for (BlockPos posx : positions) {
+                placementModifier.getPositions(context, random, posx).forEach(newPositions::add);
+            }
+            positions = newPositions;
         }
 
         ConfiguredFeature<?, ?> configuredFeature = this.feature.value();
         MutableBoolean mutableBoolean = new MutableBoolean();
-        stream.forEach(placedPos -> {
+        for (BlockPos placedPos : positions) {
             if (configuredFeature.place(context.getLevel(), context.generator(), random, placedPos)) {
                 mutableBoolean.setTrue();
             }
-        });
+        }
+        // Leaf end - Remove stream in PlacedFeature
         return mutableBoolean.isTrue();
     }