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-rw-r--r--patches/server/0686-Oprimise-map-impl-for-tracked-players.patch21
1 files changed, 21 insertions, 0 deletions
diff --git a/patches/server/0686-Oprimise-map-impl-for-tracked-players.patch b/patches/server/0686-Oprimise-map-impl-for-tracked-players.patch
new file mode 100644
index 0000000000..42fe98d24e
--- /dev/null
+++ b/patches/server/0686-Oprimise-map-impl-for-tracked-players.patch
@@ -0,0 +1,21 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <[email protected]>
+Date: Fri, 19 Feb 2021 22:51:52 -0800
+Subject: [PATCH] Oprimise map impl for tracked players
+
+Reference2BooleanOpenHashMap is going to have
+better lookups than HashMap.
+
+diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
+index 290a231deb203eb46cb91eb23c28d8e9d49b0f34..b71be5e7e18f884cf35cc3a940c87e744e00f811 100644
+--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
++++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
+@@ -1302,7 +1302,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
+ final Entity entity;
+ private final int range;
+ SectionPos lastSectionPos;
+- public final Set<ServerPlayerConnection> seenBy = Sets.newIdentityHashSet();
++ public final Set<ServerPlayerConnection> seenBy = new it.unimi.dsi.fastutil.objects.ReferenceOpenHashSet<>(); // Paper - optimise map impl
+
+ public TrackedEntity(Entity entity, int i, int j, boolean flag) {
+ this.serverEntity = new ServerEntity(ChunkMap.this.level, entity, j, flag, this::broadcast, this.seenBy); // CraftBukkit