Entity Activation Range

This feature gives 3 new configurable ranges that if an entity of the matching type is outside of this radius of any player, will tick at 5% of its normal rate.

This will drastically cut down on tick timings for entities that are not in range of a user to actually be "used".
This change can have dramatic impact on gameplay if configured too low. Balance according to your servers desired gameplay.

By: Aikar <aikar@aikar.co>

paper-server/patches/sources/net/minecraft/world/entity/npc/Villager.java.patch

@@ -24,7 +24,26 @@
      }
  
      @Override
-@@ -235,7 +243,7 @@
+@@ -216,7 +224,18 @@
+         return this.assignProfessionWhenSpawned;
+     }
+ 
++    // Spigot Start
+     @Override
++    public void inactiveTick() {
++        // SPIGOT-3874, SPIGOT-3894, SPIGOT-3846, SPIGOT-5286 :(
++        if (this.level().spigotConfig.tickInactiveVillagers && this.isEffectiveAi()) {
++            this.customServerAiStep((ServerLevel) this.level());
++        }
++        super.inactiveTick();
++    }
++    // Spigot End
++
++    @Override
+     protected void customServerAiStep(ServerLevel world) {
+         ProfilerFiller gameprofilerfiller = Profiler.get();
+ 
+@@ -235,7 +254,7 @@
                      this.increaseProfessionLevelOnUpdate = false;
                  }
  
@@ -33,7 +52,7 @@
              }
          }
  
-@@ -360,7 +368,13 @@
+@@ -360,7 +379,13 @@
          while (iterator.hasNext()) {
              MerchantOffer merchantrecipe = (MerchantOffer) iterator.next();
  
@@ -48,7 +67,7 @@
          }
  
          this.resendOffersToTradingPlayer();
-@@ -429,7 +443,13 @@
+@@ -429,7 +454,13 @@
              while (iterator.hasNext()) {
                  MerchantOffer merchantrecipe = (MerchantOffer) iterator.next();
  
@@ -63,7 +82,7 @@
              }
          }
  
-@@ -489,7 +509,7 @@
+@@ -489,7 +520,7 @@
      @Override
      public void addAdditionalSaveData(CompoundTag nbt) {
          super.addAdditionalSaveData(nbt);
@@ -72,7 +91,7 @@
          Logger logger = Villager.LOGGER;
  
          Objects.requireNonNull(logger);
-@@ -512,7 +532,7 @@
+@@ -512,7 +543,7 @@
      public void readAdditionalSaveData(CompoundTag nbt) {
          super.readAdditionalSaveData(nbt);
          if (nbt.contains("VillagerData", 10)) {
@@ -81,7 +100,7 @@
              Logger logger = Villager.LOGGER;
  
              Objects.requireNonNull(logger);
-@@ -808,7 +828,7 @@
+@@ -808,7 +839,7 @@
                  entitywitch1.finalizeSpawn(world, world.getCurrentDifficultyAt(entitywitch1.blockPosition()), EntitySpawnReason.CONVERSION, (SpawnGroupData) null);
                  entitywitch1.setPersistenceRequired();
                  this.releaseAllPois();
@@ -90,7 +109,7 @@
  
              if (entitywitch == null) {
                  super.thunderHit(world, lightning);
-@@ -906,7 +926,7 @@
+@@ -906,7 +937,7 @@
              }).limit(5L).toList();
  
              if (list1.size() >= requiredCount) {
@@ -99,7 +118,7 @@
                      list.forEach(GolemSensor::golemDetected);
                  }
              }
-@@ -963,7 +983,7 @@
+@@ -963,7 +994,7 @@
      @Override
      public void startSleeping(BlockPos pos) {
          super.startSleeping(pos);
@@ -108,7 +127,7 @@
          this.brain.eraseMemory(MemoryModuleType.WALK_TARGET);
          this.brain.eraseMemory(MemoryModuleType.CANT_REACH_WALK_TARGET_SINCE);
      }
-@@ -971,7 +991,7 @@
+@@ -971,7 +1002,7 @@
      @Override
      public void stopSleeping() {
          super.stopSleeping();