From a11c674e76dba82e797e970fefe89accb67b2769 Mon Sep 17 00:00:00 2001 From: CullanP 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 863a2222f..f2a04cb6a 100644 --- a/src/main/java/net/minecraft/server/Chunk.java +++ b/src/main/java/net/minecraft/server/Chunk.java @@ -84,6 +84,10 @@ 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 ticklist, TickList ticklist1, long i, @Nullable ChunkSection[] achunksection, @Nullable Consumer consumer) { @@ -430,6 +434,13 @@ public class Chunk implements IChunkAccess { entity.chunkY = k; entity.chunkZ = this.loc.z; 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 } @@ -460,6 +471,11 @@ 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 @@ -727,9 +743,29 @@ 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.c` + * + * 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 498f38109..a2d1ef360 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 c = (entity) -> { return entity.isAlive() && !entity.isVehicle() && !entity.isPassenger(); }; + public static final Predicate isInventory() { return d; } // Paper - OBFHELPER public static final Predicate d = (entity) -> { return entity instanceof IInventory && entity.isAlive(); }; -- 2.24.1