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-rw-r--r--patches/server/0470-Lazily-track-plugin-scoreboards-by-default.patch76
1 files changed, 76 insertions, 0 deletions
diff --git a/patches/server/0470-Lazily-track-plugin-scoreboards-by-default.patch b/patches/server/0470-Lazily-track-plugin-scoreboards-by-default.patch
new file mode 100644
index 0000000000..37ef8c7f81
--- /dev/null
+++ b/patches/server/0470-Lazily-track-plugin-scoreboards-by-default.patch
@@ -0,0 +1,76 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Andrew Steinborn <[email protected]>
+Date: Sat, 3 Oct 2020 04:15:09 -0400
+Subject: [PATCH] Lazily track plugin scoreboards by default
+
+On servers with plugins that constantly churn through scoreboards, there is a risk of
+degraded GC performance due to the number of scoreboards held on by weak references.
+Most plugins don't even need the (vanilla) functionality that requires all plugin
+scoreboards to be tracked by the server. Instead, only track scoreboards when an
+objective is added with a non-dummy criteria.
+
+This is a breaking change, however the change is a much more sensible default. In case
+this breaks your workflow you can always force all scoreboards to be tracked with
+settings.track-plugin-scoreboards in paper.yml.
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
+index 2471a6d0b7a8086cf4c0a41b10c05ed50d790d11..e233eef291f64622947b0b6c4559639e510c087f 100644
+--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
++++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboard.java
+@@ -18,6 +18,7 @@ import org.bukkit.scoreboard.Team;
+
+ public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
+ final Scoreboard board;
++ boolean registeredGlobally = false; // Paper
+
+ CraftScoreboard(Scoreboard board) {
+ this.board = board;
+@@ -50,6 +51,12 @@ public final class CraftScoreboard implements org.bukkit.scoreboard.Scoreboard {
+ Preconditions.checkArgument(renderType != null, "RenderType cannot be null");
+ Preconditions.checkArgument(name.length() <= Short.MAX_VALUE, "The name '%s' is longer than the limit of 32767 characters (%s)", name, name.length());
+ Preconditions.checkArgument(this.board.getObjective(name) == null, "An objective of name '%s' already exists", name);
++ // Paper start - the block comment from the old registerNewObjective didnt cause a conflict when rebasing, so this block wasn't added to the adventure registerNewObjective
++ if (((CraftCriteria) criteria).criteria != net.minecraft.world.scores.criteria.ObjectiveCriteria.DUMMY && !this.registeredGlobally) {
++ net.minecraft.server.MinecraftServer.getServer().server.getScoreboardManager().registerScoreboardForVanilla(this);
++ this.registeredGlobally = true;
++ }
++ // Paper end
+ net.minecraft.world.scores.Objective objective = board.addObjective(name, ((CraftCriteria) criteria).criteria, io.papermc.paper.adventure.PaperAdventure.asVanilla(displayName), CraftScoreboardTranslations.fromBukkitRender(renderType));
+ return new CraftObjective(this, objective);
+ }
+diff --git a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java
+index d3855731f9b63357ebe4f8f4d5941b5353dff935..6fcb2356b471c5a61faa0813a891c3898683d01f 100644
+--- a/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java
++++ b/src/main/java/org/bukkit/craftbukkit/scoreboard/CraftScoreboardManager.java
+@@ -30,6 +30,7 @@ public final class CraftScoreboardManager implements ScoreboardManager {
+
+ public CraftScoreboardManager(MinecraftServer minecraftserver, net.minecraft.world.scores.Scoreboard scoreboardServer) {
+ this.mainScoreboard = new CraftScoreboard(scoreboardServer);
++ mainScoreboard.registeredGlobally = true; // Paper
+ this.server = minecraftserver;
+ this.scoreboards.add(mainScoreboard);
+ }
+@@ -43,10 +44,22 @@ public final class CraftScoreboardManager implements ScoreboardManager {
+ public CraftScoreboard getNewScoreboard() {
+ org.spigotmc.AsyncCatcher.catchOp("scoreboard creation"); // Spigot
+ CraftScoreboard scoreboard = new CraftScoreboard(new ServerScoreboard(this.server));
+- this.scoreboards.add(scoreboard);
++ // Paper start
++ if (io.papermc.paper.configuration.GlobalConfiguration.get().scoreboards.trackPluginScoreboards) {
++ scoreboard.registeredGlobally = true;
++ scoreboards.add(scoreboard);
++ }
++ // Paper end
+ return scoreboard;
+ }
+
++ // Paper start
++ public void registerScoreboardForVanilla(CraftScoreboard scoreboard) {
++ org.spigotmc.AsyncCatcher.catchOp("scoreboard registration");
++ scoreboards.add(scoreboard);
++ }
++ // Paper end
++
+ // CraftBukkit method
+ public CraftScoreboard getPlayerBoard(CraftPlayer player) {
+ CraftScoreboard board = this.playerBoards.get(player);