From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: nostalgic853 <yuu8583@proton.me>
Date: Thu, 20 Oct 2022 10:31:11 +0800
Subject: [PATCH] Raid optimizations

Original code by CaffeineMC, licensed under GNU Lesser General Public License v3.0
You can find the original code on https://github.com/CaffeineMC/lithium-fabric (Yarn mappings)

diff --git a/src/main/java/net/minecraft/world/entity/raid/Raid.java b/src/main/java/net/minecraft/world/entity/raid/Raid.java
index 6a0a1731fd6804eb69d3641213712d31bce085b2..06110d58342d07cf454f1829140855ac762c8b80 100644
--- a/src/main/java/net/minecraft/world/entity/raid/Raid.java
+++ b/src/main/java/net/minecraft/world/entity/raid/Raid.java
@@ -79,6 +79,7 @@ public class Raid {
     public static final int TICKS_PER_DAY = 24000;
     public static final int DEFAULT_MAX_BAD_OMEN_LEVEL = 5;
     private static final int LOW_MOB_THRESHOLD = 2;
+    private static final ItemStack CACHED_LEADER_BANNER; // KeYi - cache the banner
     private static final Component RAID_NAME_COMPONENT = Component.translatable("event.minecraft.raid");
     private static final Component VICTORY = Component.translatable("event.minecraft.raid.victory");
     private static final Component DEFEAT = Component.translatable("event.minecraft.raid.defeat");
@@ -108,6 +109,20 @@ public class Raid {
     private int celebrationTicks;
     private Optional<BlockPos> waveSpawnPos;
 
+    // KeYi start - cache the banner
+    static {
+        ItemStack itemstack = new ItemStack(Items.WHITE_BANNER);
+        CompoundTag nbttagcompound = new CompoundTag();
+        ListTag nbttaglist = (new BannerPattern.Builder()).addPattern(BannerPatterns.RHOMBUS_MIDDLE, DyeColor.CYAN).addPattern(BannerPatterns.STRIPE_BOTTOM, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.STRIPE_CENTER, DyeColor.GRAY).addPattern(BannerPatterns.BORDER, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.STRIPE_MIDDLE, DyeColor.BLACK).addPattern(BannerPatterns.HALF_HORIZONTAL, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.CIRCLE_MIDDLE, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.BORDER, DyeColor.BLACK).toListTag();
+
+        nbttagcompound.put("Patterns", nbttaglist);
+        BlockItem.setBlockEntityData(itemstack, BlockEntityType.BANNER, nbttagcompound);
+        itemstack.hideTooltipPart(ItemStack.TooltipPart.ADDITIONAL);
+        itemstack.setHoverName(Component.translatable("block.minecraft.ominous_banner").withStyle(ChatFormatting.GOLD));
+        CACHED_LEADER_BANNER = itemstack;
+    }
+    // KeYi end
+
     public Raid(int id, ServerLevel world, BlockPos pos) {
         this.raidEvent = new ServerBossEvent(Raid.RAID_NAME_COMPONENT, BossEvent.BossBarColor.RED, BossEvent.BossBarOverlay.NOTCHED_10);
         this.random = RandomSource.create();
@@ -270,6 +285,13 @@ public class Raid {
     }
 
     public void tick() {
+        // KeYi start - Lithium - ai.raid: reduce updates
+        if (this.isBarDirty) {
+            this.raidEvent.setProgress(Mth.clamp(this.getHealthOfLivingRaiders() / this.totalHealth, 0.0F, 1.0F));
+            this.isBarDirty = false;
+        }
+        // KeYi end
+
         if (!this.isStopped()) {
             if (this.status == Raid.RaidStatus.ONGOING) {
                 boolean flag = this.active;
@@ -625,8 +647,10 @@ public class Raid {
 
     }
 
+    private boolean isBarDirty = false; // KeYi - Lithium - ai.raid: reduce updates
+
     public void updateBossbar() {
-        this.raidEvent.setProgress(Mth.clamp(this.getHealthOfLivingRaiders() / this.totalHealth, 0.0F, 1.0F));
+        this.isBarDirty = true; // KeYi - Lithium - ai.raid: reduce updates
     }
 
     public float getHealthOfLivingRaiders() {
@@ -678,15 +702,7 @@ public class Raid {
     }
 
     public static ItemStack getLeaderBannerInstance() {
-        ItemStack itemstack = new ItemStack(Items.WHITE_BANNER);
-        CompoundTag nbttagcompound = new CompoundTag();
-        ListTag nbttaglist = (new BannerPattern.Builder()).addPattern(BannerPatterns.RHOMBUS_MIDDLE, DyeColor.CYAN).addPattern(BannerPatterns.STRIPE_BOTTOM, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.STRIPE_CENTER, DyeColor.GRAY).addPattern(BannerPatterns.BORDER, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.STRIPE_MIDDLE, DyeColor.BLACK).addPattern(BannerPatterns.HALF_HORIZONTAL, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.CIRCLE_MIDDLE, DyeColor.LIGHT_GRAY).addPattern(BannerPatterns.BORDER, DyeColor.BLACK).toListTag();
-
-        nbttagcompound.put("Patterns", nbttaglist);
-        BlockItem.setBlockEntityData(itemstack, BlockEntityType.BANNER, nbttagcompound);
-        itemstack.hideTooltipPart(ItemStack.TooltipPart.ADDITIONAL);
-        itemstack.setHoverName(Component.translatable("block.minecraft.ominous_banner").withStyle(ChatFormatting.GOLD));
-        return itemstack;
+        return CACHED_LEADER_BANNER; // KeYi - cache the banner
     }
 
     @Nullable