From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: NONPLAYT <76615486+NONPLAYT@users.noreply.github.com>
Date: Tue, 14 Oct 2025 01:35:26 +0300
Subject: [PATCH] Pufferfish: Cache climbing check for activation

This patch is based on the following patch:
"Cache climbing check for activation"
By: Paul Sauve <paul@technove.co>
As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish)
Licensed under: GPL-3.0 (https://www.gnu.org/licenses/gpl-3.0.html)

diff --git a/io/papermc/paper/entity/activation/ActivationRange.java b/io/papermc/paper/entity/activation/ActivationRange.java
index 226088405c019922085285ba5d04d7c131470c69..61bf86a1380060ff118c31b5070b28705a897529 100644
--- a/io/papermc/paper/entity/activation/ActivationRange.java
+++ b/io/papermc/paper/entity/activation/ActivationRange.java
@@ -238,7 +238,7 @@ public final class ActivationRange {
         }
         // special cases.
         if (entity instanceof final LivingEntity living) {
-            if (living.onClimbable() || living.jumping || living.hurtTime > 0 || !living.activeEffects.isEmpty() || living.isFreezing()) {
+            if (living.onClimbableCached() || living.jumping || living.hurtTime > 0 || !living.activeEffects.isEmpty() || living.isFreezing()) { // DivineMC - Pufferfish: Cache climbing check for activation
                 return 1;
             }
             if (entity instanceof final Mob mob && mob.getTarget() != null) {
diff --git a/net/minecraft/world/entity/LivingEntity.java b/net/minecraft/world/entity/LivingEntity.java
index 85e287bc66c4e2be6f703c3206fe53bba3d15a6d..fe7232b25458f363dfc43dd1eccab5b95212fc10 100644
--- a/net/minecraft/world/entity/LivingEntity.java
+++ b/net/minecraft/world/entity/LivingEntity.java
@@ -2236,6 +2236,20 @@ public abstract class LivingEntity extends Entity implements Attackable, Waypoin
         return this.lastClimbablePos;
     }
 
+    // DivineMC start - Pufferfish: Cache climbing check for activation
+    private boolean cachedOnClimbable = false;
+    private BlockPos lastClimbingPosition = null;
+
+    public boolean onClimbableCached() {
+        if (!this.blockPosition().equals(this.lastClimbingPosition)) {
+            this.cachedOnClimbable = this.onClimbable();
+            this.lastClimbingPosition = this.blockPosition();
+        }
+
+        return this.cachedOnClimbable;
+    }
+    // DivineMC end - Pufferfish: Cache climbing check for activation
+
     public boolean onClimbable() {
         if (this.isSpectator()) {
             return false;