99 lines
4.2 KiB
Diff
99 lines
4.2 KiB
Diff
From c0a13468860520d04911b27b40c3f733606f380f Mon Sep 17 00:00:00 2001
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From: CullanP <cullanpage@gmail.com>
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Date: Thu, 3 Mar 2016 02:13:38 -0600
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Subject: [PATCH] Avoid hopper searches if there are no items
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Hoppers searching for items and minecarts is the most expensive part of hopper ticking.
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We keep track of the number of minecarts and items in a chunk.
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If there are no items in the chunk, we skip searching for items.
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If there are no minecarts in the chunk, we skip searching for them.
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Usually hoppers aren't near items, so we can skip most item searches.
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And since minecart hoppers are used _very_ rarely near we can avoid alot of searching there.
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Combined, this adds up a lot.
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diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
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index 42fedb7..806e499 100644
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--- a/src/main/java/net/minecraft/server/Chunk.java
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+++ b/src/main/java/net/minecraft/server/Chunk.java
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@@ -46,6 +46,13 @@ public class Chunk {
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protected gnu.trove.map.hash.TObjectIntHashMap<Class> entityCount = new gnu.trove.map.hash.TObjectIntHashMap<Class>(); // Spigot
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public int lightUpdates; // Paper - Number of queued light updates for this chunk
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+ // Paper start
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+ // Track the number of minecarts and items
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+ // Keep this synced with entitySlices.add() and entitySlices.remove()
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+ private final int[] itemCounts = new int[16];
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+ private final int[] inventoryEntityCounts = new int[16];
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+ // Paper end
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+
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// CraftBukkit start - Neighbor loaded cache for chunk lighting and entity ticking
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private int neighbors = 0x1 << 12;
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@@ -653,6 +660,13 @@ public class Chunk {
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entity.ac = k;
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entity.ad = this.locZ;
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this.entitySlices[k].add(entity);
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+ // Paper start - update count
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+ if (entity instanceof EntityItem) {
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+ itemCounts[k]++;
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+ } else if (entity instanceof IInventory) {
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+ inventoryEntityCounts[k]++;
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+ }
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+ // Paper end
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// Spigot start - increment creature type count
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// Keep this synced up with World.a(Class)
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if (entity instanceof EntityInsentient) {
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@@ -685,6 +699,13 @@ public class Chunk {
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}
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this.entitySlices[i].remove(entity);
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+ // Paper start - update counts
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+ if (entity instanceof EntityItem) {
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+ itemCounts[i]--;
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+ } else if (entity instanceof IInventory) {
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+ inventoryEntityCounts[i]--;
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+ }
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+ // Paper end
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// Spigot start - decrement creature type count
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// Keep this synced up with World.a(Class)
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if (entity instanceof EntityInsentient) {
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@@ -874,6 +895,15 @@ public class Chunk {
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if (!this.entitySlices[k].isEmpty()) {
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Iterator iterator = this.entitySlices[k].iterator();
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+ // Paper start - Don't search for inventories if we have none, and that is all we want
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+ /*
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+ * We check if they want inventories by seeing if it is the static `IEntitySelector.c`
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+ *
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+ * Make sure the inventory selector stays in sync.
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+ * It should be the one that checks `var1 instanceof IInventory && var1.isAlive()`
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+ */
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+ if (predicate == IEntitySelector.c && inventoryEntityCounts[k] <= 0) continue;
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+ // Paper end
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while (iterator.hasNext()) {
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Entity entity1 = (Entity) iterator.next();
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@@ -906,7 +936,18 @@ public class Chunk {
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i = MathHelper.clamp(i, 0, this.entitySlices.length - 1);
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j = MathHelper.clamp(j, 0, this.entitySlices.length - 1);
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+ // Paper start
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+ int[] counts;
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+ if (ItemStack.class.isAssignableFrom(oclass)) {
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+ counts = itemCounts;
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+ } else if (IInventory.class.isAssignableFrom(oclass)) {
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+ counts = inventoryEntityCounts;
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+ } else {
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+ counts = null;
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+ }
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+ // Paper end
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for (int k = i; k <= j; ++k) {
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+ if (counts != null && counts[k] <= 0) continue; // Paper - Don't check a chunk if it doesn't have the type we are looking for
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Iterator iterator = this.entitySlices[k].iterator(); // Spigot
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while (iterator.hasNext()) {
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--
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2.7.4
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