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-rw-r--r--patches/server/0884-Optimize-player-lookups-for-beacons.patch36
1 files changed, 36 insertions, 0 deletions
diff --git a/patches/server/0884-Optimize-player-lookups-for-beacons.patch b/patches/server/0884-Optimize-player-lookups-for-beacons.patch
new file mode 100644
index 0000000000..3b3d11c547
--- /dev/null
+++ b/patches/server/0884-Optimize-player-lookups-for-beacons.patch
@@ -0,0 +1,36 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Spottedleaf <[email protected]>
+Date: Thu, 6 Jul 2023 20:17:37 -0700
+Subject: [PATCH] Optimize player lookups for beacons
+
+For larger ranges, it's better to iterate over the player list
+than the entity slices.
+
+diff --git a/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java b/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
+index eff48e43a35a752bd33de2b55a0ad04332109ce0..4b81b0180dfc96fc6a88646838a886ca5b5d301b 100644
+--- a/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
++++ b/src/main/java/net/minecraft/world/level/block/entity/BeaconBlockEntity.java
+@@ -329,7 +329,22 @@ public class BeaconBlockEntity extends BlockEntity implements MenuProvider, Name
+ double d0 = blockEntity != null ? blockEntity.getEffectRange() : (i * 10 + 10); // Paper - Custom beacon ranges
+
+ AABB axisalignedbb = (new AABB(blockposition)).inflate(d0).expandTowards(0.0D, (double) world.getHeight(), 0.0D);
+- List<Player> list = world.getEntitiesOfClass(Player.class, axisalignedbb);
++ // Paper start - Perf: optimize player lookup for beacons
++ List<Player> list;
++ if (d0 <= 128.0) {
++ list = world.getEntitiesOfClass(Player.class, axisalignedbb);
++ } else {
++ list = new java.util.ArrayList<>();
++ for (Player player : world.players()) {
++ if (player.isSpectator()) {
++ continue;
++ }
++ if (player.getBoundingBox().intersects(axisalignedbb)) {
++ list.add(player);
++ }
++ }
++ }
++ // Paper end - Perf: optimize player lookup for beacons
+
+ return list;
+ }