From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: peaches94 <peachescu94@gmail.com>
Date: Sun, 10 Jul 2022 15:44:38 -0500
Subject: [PATCH] feat: reduce sensor work

this patch is focused around the sensors used for ai
delete the line of sight cache less often and use a faster nearby comparison

diff --git a/src/main/java/net/minecraft/world/entity/LivingEntity.java b/src/main/java/net/minecraft/world/entity/LivingEntity.java
index 260e094bad8d6f1b775e317ba2c9b3e25cfa7467..cd313f488ecb922c8ac1fefff285bd56c2d7de40 100644
--- a/src/main/java/net/minecraft/world/entity/LivingEntity.java
+++ b/src/main/java/net/minecraft/world/entity/LivingEntity.java
@@ -1012,20 +1012,22 @@ public abstract class LivingEntity extends Entity {
         }
 
         if (entity != null) {
-            ItemStack itemstack = this.getItemBySlot(EquipmentSlot.HEAD);
+            // petal start - only do itemstack lookup if we need to
+            //ItemStack itemstack = this.getItemBySlot(EquipmentSlot.HEAD);
             EntityType<?> entitytypes = entity.getType();
 
             // Purpur start
-            if (entitytypes == EntityType.SKELETON && itemstack.is(Items.SKELETON_SKULL)) {
+            if (entitytypes == EntityType.SKELETON && this.getItemBySlot(EquipmentSlot.HEAD).is(Items.SKELETON_SKULL)) {
                 d0 *= entity.level.purpurConfig.skeletonHeadVisibilityPercent;
             }
-            else if (entitytypes == EntityType.ZOMBIE && itemstack.is(Items.ZOMBIE_HEAD)) {
+            else if (entitytypes == EntityType.ZOMBIE && this.getItemBySlot(EquipmentSlot.HEAD).is(Items.ZOMBIE_HEAD)) {
                 d0 *= entity.level.purpurConfig.zombieHeadVisibilityPercent;
             }
-            else if (entitytypes == EntityType.CREEPER && itemstack.is(Items.CREEPER_HEAD)) {
+            else if (entitytypes == EntityType.CREEPER && this.getItemBySlot(EquipmentSlot.HEAD).is(Items.CREEPER_HEAD)) {
                 d0 *= entity.level.purpurConfig.creeperHeadVisibilityPercent;
             }
             // Purpur end
+            // petal end
 
             // Purpur start
             if (entity instanceof LivingEntity entityliving) {
diff --git a/src/main/java/net/minecraft/world/entity/Mob.java b/src/main/java/net/minecraft/world/entity/Mob.java
index ec4f04327eb875989af4d7da0171e2000fadef6b..b99c2710fa2f0e1d748fa16006113bfd913d17e9 100644
--- a/src/main/java/net/minecraft/world/entity/Mob.java
+++ b/src/main/java/net/minecraft/world/entity/Mob.java
@@ -884,10 +884,10 @@ public abstract class Mob extends LivingEntity {
             return;
         }
         // Paper end
+        int i = this.level.getServer().getTickCount() + this.getId(); // petal - move up
         //this.level.getProfiler().push("sensing"); // Purpur
-        this.sensing.tick();
+        if (i % 10 == 0) this.sensing.tick(); // petal - only refresh line of sight cache every half second
         //this.level.getProfiler().pop(); // Purpur
-        int i = this.level.getServer().getTickCount() + this.getId();
 
         if (i % 2 != 0 && this.tickCount > 1) {
             //this.level.getProfiler().push("targetSelector"); // Purpur