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89d51d5f29
Because this exploit has been widely known for years and has not been fixed by Mojang, we decided that it was worth allowing people to toggle it on/off due to how easy it is to make it configurable. It should be noted that this decision does not promise all future exploits will be configurable.
56 lines
2.7 KiB
Diff
56 lines
2.7 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: jellysquid3 <jellysquid3@users.noreply.github.com>
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Date: Sat, 8 Jul 2023 21:38:05 +0200
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Subject: [PATCH] Array backed synched entity data
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Original code by jellysquid3 in Lithium, licensed under the GNU Lesser General Public License v3.0 (https://www.gnu.org/licenses/lgpl-3.0.html)
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diff --git a/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java b/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java
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index d088479d160dbd2fc90b48a30553be141db8eef2..07a362f9e485d0d507f16f1dda1ac84ade07ab27 100644
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--- a/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java
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+++ b/src/main/java/net/minecraft/network/syncher/SynchedEntityData.java
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@@ -34,6 +34,11 @@ public class SynchedEntityData {
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private final Int2ObjectMap<SynchedEntityData.DataItem<?>> itemsById = new Int2ObjectOpenHashMap();
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// private final ReadWriteLock lock = new ReentrantReadWriteLock(); // Spigot - not required
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private boolean isDirty;
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+ // Paper start - Perf: array backed synched entity data
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+ private static final int DEFAULT_ENTRY_COUNT = 10;
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+ private static final int GROW_FACTOR = 8;
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+ private SynchedEntityData.DataItem<?>[] itemsArray = new SynchedEntityData.DataItem<?>[DEFAULT_ENTRY_COUNT];
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+ // Paper end - Perf: array backed synched entity data
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public SynchedEntityData(Entity trackedEntity) {
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this.entity = trackedEntity;
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@@ -103,6 +108,15 @@ public class SynchedEntityData {
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// this.lock.writeLock().lock(); // Spigot - not required
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this.itemsById.put(key.getId(), datawatcher_item);
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// this.lock.writeLock().unlock(); // Spigot - not required
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+ // Paper start - Perf: array backed synched entity data
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+ if (this.itemsArray.length <= key.getId()) {
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+ final int newSize = Math.min(key.getId() + GROW_FACTOR, MAX_ID_VALUE);
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+
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+ this.itemsArray = java.util.Arrays.copyOf(this.itemsArray, newSize);
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+ }
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+
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+ this.itemsArray[key.getId()] = datawatcher_item;
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+ // Paper end - Perf: array backed synched entity data
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}
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public <T> boolean hasItem(EntityDataAccessor<T> key) {
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@@ -130,7 +144,15 @@ public class SynchedEntityData {
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return datawatcher_item;
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*/
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- return (SynchedEntityData.DataItem) this.itemsById.get(key.getId());
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+ // Paper start - Perf: array backed synched entity data
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+ final int id = key.getId();
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+
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+ if (id < 0 || id >= this.itemsArray.length) {
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+ return null;
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+ }
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+
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+ return (DataItem<T>) this.itemsArray[id];
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+ // Paper end - Perf: array backed synched entity data
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// Spigot end
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}
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