From f1976dd6704c5cad38c48a61834c781cad708264 Mon Sep 17 00:00:00 2001 From: Aikar Date: Sun, 8 Mar 2015 04:03:56 -0500 Subject: [PATCH] Player lookup improvements Minecraft and CraftBukkit both use Arrays to store online players, and any time a player needs to be looked up by name or UUID, the system iterates all online players and does a name or UUID comparison. This is very ineffecient and can reduce performance on servers with high player count. By using a map based approach for player lookups, player lookup should be consistent in performance regardless of how many players are online. diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java index 49a14ea..74741cd 100644 --- a/src/main/java/net/minecraft/server/PlayerList.java +++ b/src/main/java/net/minecraft/server/PlayerList.java @@ -49,6 +49,31 @@ public abstract class PlayerList { private static final SimpleDateFormat g = new SimpleDateFormat("yyyy-MM-dd \'at\' HH:mm:ss z"); private final MinecraftServer server; public final List players = new java.util.concurrent.CopyOnWriteArrayList(); // CraftBukkit - ArrayList -> CopyOnWriteArrayList: Iterator safety, public + // PaperSpigot start - Player lookup improvements + public final Map playerMap = new java.util.HashMap() { + @Override + public EntityPlayer put(String key, EntityPlayer value) { + return super.put(key.toLowerCase(), value); + } + + @Override + public EntityPlayer get(Object key) { + // put the .playerConnection check done in other places here + EntityPlayer player = super.get(key instanceof String ? ((String) key).toLowerCase() : key); + return (player != null && player.playerConnection != null) ? player : null; + } + + @Override + public boolean containsKey(Object key) { + return get(key) != null; + } + + @Override + public EntityPlayer remove(Object key) { + return super.remove(key instanceof String ? ((String) key).toLowerCase() : key); + } + }; + // PaperSpigot end private final Map j = Maps.newHashMap(); private final GameProfileBanList k; private final IpBanList l; @@ -287,6 +312,7 @@ public abstract class PlayerList { public void onPlayerJoin(EntityPlayer entityplayer, String joinMessage) { // CraftBukkit added param this.players.add(entityplayer); + this.playerMap.put(entityplayer.getName(), entityplayer); // PaperSpigot this.j.put(entityplayer.getUniqueID(), entityplayer); // this.sendAll(new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, new EntityPlayer[] { entityplayer})); // CraftBukkit - replaced with loop below WorldServer worldserver = this.server.getWorldServer(entityplayer.dimension); @@ -358,6 +384,7 @@ public abstract class PlayerList { worldserver.kill(entityplayer); worldserver.getPlayerChunkMap().removePlayer(entityplayer); this.players.remove(entityplayer); + this.playerMap.remove(entityplayer.getName()); // PaperSpigot UUID uuid = entityplayer.getUniqueID(); EntityPlayer entityplayer1 = (EntityPlayer) this.j.get(uuid); @@ -395,6 +422,8 @@ public abstract class PlayerList { EntityPlayer entityplayer; + // PaperSpigot start - Use exact lookup below + /* for (int i = 0; i < this.players.size(); ++i) { entityplayer = (EntityPlayer) this.players.get(i); if (entityplayer.getUniqueID().equals(uuid)) { @@ -406,6 +435,9 @@ public abstract class PlayerList { while (iterator.hasNext()) { entityplayer = (EntityPlayer) iterator.next(); + */ + if ((entityplayer = this.a(uuid)) != null) { + // PaperSpigot end savePlayerFile(entityplayer); // CraftBukkit - Force the player's inventory to be saved entityplayer.playerConnection.disconnect("You logged in from another location"); } @@ -1010,6 +1042,7 @@ public abstract class PlayerList { } public EntityPlayer getPlayer(String s) { + if (true) { return playerMap.get(s); } // PaperSpigot Iterator iterator = this.players.iterator(); EntityPlayer entityplayer; diff --git a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java index 8be0698..4a908c6 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftOfflinePlayer.java @@ -144,14 +144,10 @@ public class CraftOfflinePlayer implements OfflinePlayer, ConfigurationSerializa } public Player getPlayer() { - for (Object obj : server.getHandle().players) { - EntityPlayer player = (EntityPlayer) obj; - if (player.getUniqueID().equals(getUniqueId())) { - return (player.playerConnection != null) ? player.playerConnection.getPlayer() : null; - } - } - - return null; + // PaperSpigot - Improved player lookup, replace entire method + final EntityPlayer playerEntity = server.getHandle().a(getUniqueId()); + return playerEntity != null ? playerEntity.getBukkitEntity() : null; + // PaperSpigot end } @Override diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java index 6aa57ae..6150255 100644 --- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java +++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java @@ -401,7 +401,12 @@ public final class CraftServer implements Server { public Player getPlayer(final String name) { Validate.notNull(name, "Name cannot be null"); - Player found = null; + // PaperSpigot start - Improved player lookup changes + Player found = getPlayerExact(name); + if (found != null) { + return found; + } + // PaperSpigot end String lowerName = name.toLowerCase(); int delta = Integer.MAX_VALUE; for (Player player : getOnlinePlayers()) { @@ -422,15 +427,10 @@ public final class CraftServer implements Server { public Player getPlayerExact(String name) { Validate.notNull(name, "Name cannot be null"); - String lname = name.toLowerCase(); - - for (Player player : getOnlinePlayers()) { - if (player.getName().equalsIgnoreCase(lname)) { - return player; - } - } - - return null; + // PaperSpigot start - Improved player lookup, replace whole method + EntityPlayer player = playerList.playerMap.get(name); + return player != null ? player.getBukkitEntity() : null; + // PaperSpigot end } @Override diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java index 20287d2..af71b8e 100644 --- a/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java +++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java @@ -104,13 +104,7 @@ public class CraftPlayer extends CraftHumanEntity implements Player { } public boolean isOnline() { - for (Object obj : server.getHandle().players) { - EntityPlayer player = (EntityPlayer) obj; - if (player.getName().equalsIgnoreCase(getName())) { - return true; - } - } - return false; + return server.getHandle().a(getUniqueId()) != null; // PaperSpigot - replace whole method } public InetSocketAddress getAddress() { -- 1.9.1