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"It was from a different time before books were as jank as they are now. As time has gone on they've only proven to be worse and worse."
108 lines
6.1 KiB
Diff
108 lines
6.1 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Bjarne Koll <lynxplay101@gmail.com>
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Date: Wed, 3 Mar 2021 12:48:48 +0100
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Subject: [PATCH] Remove streams from SensorNearest
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The behavioural nearby sensors are validated every tick on the entities
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that registered the respective sensors and are therefore a good subject
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to performance improvements.
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More specifically this commit replaces the Stream#filter usage with
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ArrayList#removeIf as the removeIf method on an array list is heavily
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optimized towards a single internal array re-allocation without any
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further overhead on the removeIf call.
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The only negative of this change is the rather agressive diff these
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patches introduce as the methods are basically being reimplemented
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compared to the previous stream-based implementation.
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See: https://nipafx.dev/java-stream-performance/
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diff --git a/src/main/java/net/minecraft/world/entity/ai/sensing/NearestItemSensor.java b/src/main/java/net/minecraft/world/entity/ai/sensing/NearestItemSensor.java
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index 7680c269c2fe0cf2a51d0ebeb34624181826d578..49f3b25d28072b61f5cc97260df61df892a58714 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/sensing/NearestItemSensor.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/sensing/NearestItemSensor.java
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@@ -28,11 +28,15 @@ public class NearestItemSensor extends Sensor<Mob> {
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return true;
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});
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list.sort(Comparator.comparingDouble(entity::distanceToSqr));
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- Optional<ItemEntity> optional = list.stream().filter((itemEntity) -> {
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- return entity.wantsToPickUp(itemEntity.getItem());
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- }).filter((itemEntity) -> {
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- return itemEntity.closerThan(entity, 9.0D);
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- }).filter(entity::hasLineOfSight).findFirst();
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- brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_WANTED_ITEM, optional);
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+ // Paper start - remove streams in favour of lists
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+ ItemEntity nearest = null;
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+ for (ItemEntity entityItem : list) {
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+ if (entity.wantsToPickUp(entityItem.getItem()) && entityItem.closerThan(entity, 9.0D) && entity.hasLineOfSight(entityItem)) {
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+ nearest = entityItem;
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+ break;
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+ }
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+ }
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+ brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_WANTED_ITEM, Optional.ofNullable(nearest));
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+ // Paper end
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}
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}
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diff --git a/src/main/java/net/minecraft/world/entity/ai/sensing/NearestLivingEntitySensor.java b/src/main/java/net/minecraft/world/entity/ai/sensing/NearestLivingEntitySensor.java
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index 66c90013e52170a657b1a5dbdb99748a19fe55e8..ffd83db0a419ab589e89feeddd3fb038d6ed5839 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/sensing/NearestLivingEntitySensor.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/sensing/NearestLivingEntitySensor.java
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@@ -21,9 +21,11 @@ public class NearestLivingEntitySensor extends Sensor<LivingEntity> {
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list.sort(Comparator.comparingDouble(entity::distanceToSqr));
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Brain<?> brain = entity.getBrain();
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brain.setMemory(MemoryModuleType.NEAREST_LIVING_ENTITIES, list);
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- brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES, list.stream().filter((livingEntity2) -> {
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- return isEntityTargetable(entity, livingEntity2);
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- }).collect(Collectors.toList()));
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+ // Paper start - remove streams in favour of lists
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+ List<LivingEntity> visibleMobs = new java.util.ArrayList<>(list);
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+ visibleMobs.removeIf(otherEntityLiving -> !Sensor.isEntityTargetable(entity, otherEntityLiving));
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+ brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_LIVING_ENTITIES, visibleMobs);
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+ // Paper end
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}
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@Override
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diff --git a/src/main/java/net/minecraft/world/entity/ai/sensing/PlayerSensor.java b/src/main/java/net/minecraft/world/entity/ai/sensing/PlayerSensor.java
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index b51574548b370f8a86d27835e9888ce1cd1d18be..457ea75137b8b02dc32bf1769ae8d57c470da470 100644
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--- a/src/main/java/net/minecraft/world/entity/ai/sensing/PlayerSensor.java
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+++ b/src/main/java/net/minecraft/world/entity/ai/sensing/PlayerSensor.java
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@@ -21,18 +21,25 @@ public class PlayerSensor extends Sensor<LivingEntity> {
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@Override
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protected void doTick(ServerLevel world, LivingEntity entity) {
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- List<Player> list = world.players().stream().filter(EntitySelector.NO_SPECTATORS).filter((serverPlayer) -> {
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- return entity.closerThan(serverPlayer, 16.0D);
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- }).sorted(Comparator.comparingDouble(entity::distanceToSqr)).collect(Collectors.toList());
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+ // Paper start - remove streams in favour of lists
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+ List<Player> players = new java.util.ArrayList<>(world.players());
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+ players.removeIf(player -> !EntitySelector.NO_SPECTATORS.test(player) || !entity.closerThan(player, 16.0D)); // Paper - removeIf only re-allocates once compared to iterator
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Brain<?> brain = entity.getBrain();
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- brain.setMemory(MemoryModuleType.NEAREST_PLAYERS, list);
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- List<Player> list2 = list.stream().filter((player) -> {
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- return isEntityTargetable(entity, player);
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- }).collect(Collectors.toList());
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- brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_PLAYER, list2.isEmpty() ? null : list2.get(0));
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- Optional<Player> optional = list2.stream().filter((player) -> {
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- return isEntityAttackable(entity, player);
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- }).findFirst();
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- brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_ATTACKABLE_PLAYER, optional);
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+
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+ brain.setMemory(MemoryModuleType.NEAREST_PLAYERS, players);
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+
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+ Player nearest = null, nearestTargetable = null;
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+ for (Player player : players) {
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+ if (Sensor.isEntityTargetable(entity, player)) {
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+ if (nearest == null) nearest = player;
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+ if (Sensor.isEntityAttackable(entity, player)) {
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+ nearestTargetable = player;
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+ break; // Both variables are assigned, no reason to loop further
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+ }
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+ }
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+ }
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+ brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_PLAYER, nearest);
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+ brain.setMemory(MemoryModuleType.NEAREST_VISIBLE_ATTACKABLE_PLAYER, nearestTargetable);
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+ // Paper end
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}
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}
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