PaperMC/Spigot-Server-Patches/0367-Avoid-hopper-searches-if-there-are-no-items.patch
Aikar 9c9583cd2b
[Auto] Updated Upstream (Bukkit/CraftBukkit/Spigot)
Upstream has released updates that appear to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing

Bukkit Changes:
8f495b8d #564: Add method to get max world size

CraftBukkit Changes:
768d7fc2d #773: Add method to get max world size

Spigot Changes:
628435a8 #103: Add async catchers to Chunk#getEntities
2020-12-12 19:42:05 -05:00

113 lines
5.7 KiB
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: CullanP <cullanpage@gmail.com>
Date: Thu, 3 Mar 2016 02:13:38 -0600
Subject: [PATCH] Avoid hopper searches if there are no items
Hoppers searching for items and minecarts is the most expensive part of hopper ticking.
We keep track of the number of minecarts and items in a chunk.
If there are no items in the chunk, we skip searching for items.
If there are no minecarts in the chunk, we skip searching for them.
Usually hoppers aren't near items, so we can skip most item searches.
And since minecart hoppers are used _very_ rarely near we can avoid alot of searching there.
Combined, this adds up a lot.
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 379291bca1cadbb5d82451d7b2c484bc89386172..80ddcb1001324a545a20a53b9deff18ddd305bc4 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -85,6 +85,10 @@ public class Chunk implements IChunkAccess {
return removed;
}
}
+ // Track the number of minecarts and items
+ // Keep this synced with entitySlices.add() and entitySlices.remove()
+ private final int[] itemCounts = new int[16];
+ private final int[] inventoryEntityCounts = new int[16];
// Paper end
public Chunk(World world, ChunkCoordIntPair chunkcoordintpair, BiomeStorage biomestorage, ChunkConverter chunkconverter, TickList<Block> ticklist, TickList<FluidType> ticklist1, long i, @Nullable ChunkSection[] achunksection, @Nullable Consumer<Chunk> consumer) {
@@ -542,6 +546,13 @@ public class Chunk implements IChunkAccess {
entity.chunkZ = this.loc.z;
this.entities.add(entity); // Paper - per chunk entity list
this.entitySlices[k].add(entity);
+ // Paper start
+ if (entity instanceof EntityItem) {
+ itemCounts[k]++;
+ } else if (entity instanceof IInventory) {
+ inventoryEntityCounts[k]++;
+ }
+ // Paper end
entity.entitySlice = this.entitySlices[k]; // Paper
this.markDirty(); // Paper
}
@@ -574,6 +585,11 @@ public class Chunk implements IChunkAccess {
if (!this.entitySlices[i].remove(entity)) {
return;
}
+ if (entity instanceof EntityItem) {
+ itemCounts[i]--;
+ } else if (entity instanceof IInventory) {
+ inventoryEntityCounts[i]--;
+ }
entityCounts.decrement(entity.getMinecraftKeyString());
this.markDirty(); // Paper
// Paper end
@@ -859,6 +875,14 @@ public class Chunk implements IChunkAccess {
for (int k = i; k <= j; ++k) {
Iterator iterator = this.entitySlices[k].iterator(); // Spigot
+ // Paper start - Don't search for inventories if we have none, and that is all we want
+ /*
+ * We check if they want inventories by seeing if it is the static `IEntitySelector.d`
+ *
+ * Make sure the inventory selector stays in sync.
+ * It should be the one that checks `var1 instanceof IInventory && var1.isAlive()`
+ */
+ if (predicate == IEntitySelector.isInventory() && inventoryEntityCounts[k] <= 0) continue;
while (iterator.hasNext()) {
T entity = (T) iterator.next(); // CraftBukkit - decompile error
if (entity.shouldBeRemoved) continue; // Paper
@@ -879,9 +903,29 @@ public class Chunk implements IChunkAccess {
i = MathHelper.clamp(i, 0, this.entitySlices.length - 1);
j = MathHelper.clamp(j, 0, this.entitySlices.length - 1);
+ // Paper start
+ int[] counts;
+ if (EntityItem.class.isAssignableFrom(oclass)) {
+ counts = itemCounts;
+ } else if (IInventory.class.isAssignableFrom(oclass)) {
+ counts = inventoryEntityCounts;
+ } else {
+ counts = null;
+ }
+ // Paper end
for (int k = i; k <= j; ++k) {
+ if (counts != null && counts[k] <= 0) continue; // Paper - Don't check a chunk if it doesn't have the type we are looking for
Iterator iterator = this.entitySlices[k].iterator(); // Spigot
+ // Paper start - Don't search for inventories if we have none, and that is all we want
+ /*
+ * We check if they want inventories by seeing if it is the static `IEntitySelector.d`
+ *
+ * Make sure the inventory selector stays in sync.
+ * It should be the one that checks `var1 instanceof IInventory && var1.isAlive()`
+ */
+ if (predicate == IEntitySelector.isInventory() && inventoryEntityCounts[k] <= 0) continue;
+ // Paper end
while (iterator.hasNext()) {
T t0 = (T) iterator.next(); // CraftBukkit - decompile error
if (t0.shouldBeRemoved) continue; // Paper
diff --git a/src/main/java/net/minecraft/server/IEntitySelector.java b/src/main/java/net/minecraft/server/IEntitySelector.java
index 3d54b7a4bf102dfc568e782706f67e4b5269eaf1..3913af9e27139538114580f7967cbf990d9307f7 100644
--- a/src/main/java/net/minecraft/server/IEntitySelector.java
+++ b/src/main/java/net/minecraft/server/IEntitySelector.java
@@ -11,6 +11,7 @@ public final class IEntitySelector {
public static final Predicate<Entity> c = (entity) -> {
return entity.isAlive() && !entity.isVehicle() && !entity.isPassenger();
};
+ public static final Predicate<Entity> isInventory() { return d; } // Paper - OBFHELPER
public static final Predicate<Entity> d = (entity) -> {
return entity instanceof IInventory && entity.isAlive();
};