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d17719e4e3
Honestly, some of these changes felt like hopium "surely this will fix the lag issues", even tho in my mind these didn't make sense Yeah, these methods do show up in the profiler, but does these *really* make sense? I don't think so, I think these are just useless patches that only attempt to hide the pain, instead of tackling the REAL issue that is causing these methods to show up in the profiler
60 lines
4.5 KiB
Diff
60 lines
4.5 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: MrPowerGamerBR <git@mrpowergamerbr.com>
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Date: Thu, 23 Nov 2023 14:36:47 -0300
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Subject: [PATCH] Optimize "canSee" checks
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The "canSee" checks is in a hot path, invoked by each entity for each player on the server if they are in tracking range, so optimizing it is pretty nice
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First, we change the original "HashMap" to fastutil's "Object2ObjectOpenHashMap", because the containsKey throughput is better
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Then, we add a "isEmpty()" check before attempting to check if the map contains something
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This seems stupid, but it does seem that it improves the performance a bit, and it makes sense, "containsKey(...)" does not attempt to check the map size before attempting to check if the map contains the key
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We also create a "canSee" method tailored for "ChunkMap#updatePlayer()", a method without the equals check (the "updatePlayer()" already checks if the entity is the same entity) and we cache the "isVisibleByDefault()" result between runs (this also seems a bit overkill because "isVisibleByDefault()" is just a method that returns a boolean, but because this is a hotpath, we need all optimizations that we can get
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diff --git a/src/main/java/net/minecraft/server/level/ChunkMap.java b/src/main/java/net/minecraft/server/level/ChunkMap.java
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index caa73632aee15583c6b6ed12a668c8f49b794708..fa4c8a52a57775ef8f23e48e57b76ff7abc370c0 100644
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--- a/src/main/java/net/minecraft/server/level/ChunkMap.java
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+++ b/src/main/java/net/minecraft/server/level/ChunkMap.java
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@@ -1436,7 +1436,7 @@ public class ChunkMap extends ChunkStorage implements ChunkHolder.PlayerProvider
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// Paper end - check Y
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// CraftBukkit start - respect vanish API
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- if (flag && !player.getBukkitEntity().canSee(this.entity.getBukkitEntity())) { // Paper - only consider hits
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+ if (flag && !player.getBukkitEntity().canSeeChunkMapUpdatePlayer(this.entity.getBukkitEntity())) { // Paper - only consider hits // SparklyPaper - optimize canSee checks
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flag = false;
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}
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// CraftBukkit end
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diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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index 83aaf3e6e377d731ce02f779f80b7bf5db46f89f..1424783f9ebf44d260721fb36c6ae90adee82e1d 100644
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--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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+++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
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@@ -183,7 +183,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
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private boolean hasPlayedBefore = false;
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private final ConversationTracker conversationTracker = new ConversationTracker();
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private final Set<String> channels = new HashSet<String>();
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- private final Map<UUID, Set<WeakReference<Plugin>>> invertedVisibilityEntities = new HashMap<>();
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+ private final Map<UUID, Set<WeakReference<Plugin>>> invertedVisibilityEntities = new it.unimi.dsi.fastutil.objects.Object2ObjectOpenHashMap<>(); // SparklyPaper - optimize canSee checks
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private final Set<UUID> unlistedEntities = new HashSet<>(); // Paper
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private static final WeakHashMap<Plugin, WeakReference<Plugin>> pluginWeakReferences = new WeakHashMap<>();
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private int hash = 0;
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@@ -2070,9 +2070,16 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
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@Override
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public boolean canSee(org.bukkit.entity.Entity entity) {
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- return this.equals(entity) || entity.isVisibleByDefault() ^ this.invertedVisibilityEntities.containsKey(entity.getUniqueId()); // SPIGOT-7312: Can always see self
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+ return this.equals(entity) || entity.isVisibleByDefault() ^ (!invertedVisibilityEntities.isEmpty() && this.invertedVisibilityEntities.containsKey(entity.getUniqueId())); // SPIGOT-7312: Can always see self // SparklyPaper - optimize canSee checks
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}
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+ // SparklyPaper - optimize canSee checks
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+ // The check in ChunkMap#updatePlayer already rejects if it is the same entity, so we don't need to check it twice, especially because CraftPlayer's equals check is a bit expensive
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+ public boolean canSeeChunkMapUpdatePlayer(org.bukkit.entity.Entity entity) {
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+ return entity.isVisibleByDefault() ^ (!invertedVisibilityEntities.isEmpty() && this.invertedVisibilityEntities.containsKey(entity.getUniqueId())); // SPIGOT-7312: Can always see self // SparklyPaper - optimize canSee checks
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+ }
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+ // SparklyPaper end
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+
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public boolean canSee(UUID uuid) {
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org.bukkit.entity.Entity entity = this.getServer().getPlayer(uuid);
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if (entity == null) {
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