From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: MrHua269 <wangxyper@163.com>
Date: Sun, 12 Jan 2025 12:25:44 +0800
Subject: [PATCH] Pufferfish: Cache climbing check for activation

Co-authored by: Paul Sauve <paul@technove.co>
As part of: Pufferfish (https://github.com/pufferfish-gg/Pufferfish/blob/04bc249f9eee6157338b6884113b6fa3192bf59b/patches/server/0017-Cache-climbing-check-for-activation.patch)
Licensed under: GPL-3.0 (https://github.com/pufferfish-gg/Pufferfish/blob/04bc249f9eee6157338b6884113b6fa3192bf59b/PATCH-LICENSE)

diff --git a/io/papermc/paper/entity/activation/ActivationRange.java b/io/papermc/paper/entity/activation/ActivationRange.java
index 328cf3c11c3ad5aa2b92a6c3bd350dd37ce6041a..7e8e67a413ec5d8ca6a0ce54fba884d361acde95 100644
--- a/io/papermc/paper/entity/activation/ActivationRange.java
+++ b/io/papermc/paper/entity/activation/ActivationRange.java
@@ -243,7 +243,7 @@ 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.onClimableCached() || living.onClimbable() || living.jumping || living.hurtTime > 0 || !living.activeEffects.isEmpty() || living.isFreezing()) { // Pufferfish - use cached
                 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 c2d7999208f8f6de8e7b8f672968ad66de701263..0c6d48363cd65cd22b4cc0ab97be977e133b64be 100644
--- a/net/minecraft/world/entity/LivingEntity.java
+++ b/net/minecraft/world/entity/LivingEntity.java
@@ -2146,6 +2146,20 @@ public abstract class LivingEntity extends Entity implements Attackable, Waypoin
         return this.lastClimbablePos;
     }
 
+
+    // Pufferfish start
+    private boolean cachedOnClimable = false;
+    private BlockPos lastClimbingPosition = null;
+
+    public boolean onClimableCached() {
+        if (!this.blockPosition().equals(this.lastClimbingPosition)) {
+            this.cachedOnClimable = this.onClimbable();
+            this.lastClimbingPosition = this.blockPosition();
+        }
+        return this.cachedOnClimable;
+    }
+    // Pufferfish end
+
     public boolean onClimbable() {
         if (this.isSpectator()) {
             return false;