Only process BlockPhysicsEvent if a plugin has a listener

Saves on some object allocation and processing when no plugin listens to this

paper-server/patches/sources/net/minecraft/server/MinecraftServer.java.patch

@@ -933,7 +933,7 @@
      }
  
      private ServerStatus.Players buildPlayerStatus() {
-@@ -1154,11 +1561,27 @@
+@@ -1154,24 +1561,43 @@
          this.getPlayerList().getPlayers().forEach((entityplayer) -> {
              entityplayer.connection.suspendFlushing();
          });
@@ -960,8 +960,10 @@
 +
          while (iterator.hasNext()) {
              ServerLevel worldserver = (ServerLevel) iterator.next();
++            worldserver.hasPhysicsEvent = org.bukkit.event.block.BlockPhysicsEvent.getHandlerList().getRegisteredListeners().length > 0; // Paper - BlockPhysicsEvent
  
-@@ -1167,11 +1590,13 @@
+             gameprofilerfiller.push(() -> {
+                 String s = String.valueOf(worldserver);
  
                  return s + " " + String.valueOf(worldserver.dimension().location());
              });
@@ -975,7 +977,7 @@
  
              gameprofilerfiller.push("tick");
  
-@@ -1186,6 +1611,7 @@
+@@ -1186,6 +1612,7 @@
  
              gameprofilerfiller.pop();
              gameprofilerfiller.pop();
@@ -983,7 +985,7 @@
          }
  
          gameprofilerfiller.popPush("connection");
-@@ -1265,7 +1691,23 @@
+@@ -1265,7 +1692,23 @@
      @Nullable
      public ServerLevel getLevel(ResourceKey<Level> key) {
          return (ServerLevel) this.levels.get(key);
@@ -1007,7 +1009,7 @@
  
      public Set<ResourceKey<Level>> levelKeys() {
          return this.levels.keySet();
-@@ -1296,7 +1738,7 @@
+@@ -1296,7 +1739,7 @@
  
      @DontObfuscate
      public String getServerModName() {
@@ -1016,7 +1018,7 @@
      }
  
      public SystemReport fillSystemReport(SystemReport details) {
-@@ -1347,7 +1789,7 @@
+@@ -1347,7 +1790,7 @@
  
      @Override
      public void sendSystemMessage(Component message) {
@@ -1025,7 +1027,7 @@
      }
  
      public KeyPair getKeyPair() {
-@@ -1481,10 +1923,20 @@
+@@ -1481,10 +1924,20 @@
  
      @Override
      public String getMotd() {
@@ -1047,7 +1049,7 @@
          this.motd = motd;
      }
  
-@@ -1507,7 +1959,7 @@
+@@ -1507,7 +1960,7 @@
      }
  
      public ServerConnectionListener getConnection() {
@@ -1056,7 +1058,7 @@
      }
  
      public boolean isReady() {
-@@ -1634,11 +2086,11 @@
+@@ -1634,11 +2087,11 @@
  
      public CompletableFuture<Void> reloadResources(Collection<String> dataPacks) {
          CompletableFuture<Void> completablefuture = CompletableFuture.supplyAsync(() -> {
@@ -1070,7 +1072,7 @@
          }, this).thenCompose((immutablelist) -> {
              MultiPackResourceManager resourcemanager = new MultiPackResourceManager(PackType.SERVER_DATA, immutablelist);
              List<Registry.PendingTags<?>> list = TagLoader.loadTagsForExistingRegistries(resourcemanager, this.registries.compositeAccess());
-@@ -1654,6 +2106,7 @@
+@@ -1654,6 +2107,7 @@
          }).thenAcceptAsync((minecraftserver_reloadableresources) -> {
              this.resources.close();
              this.resources = minecraftserver_reloadableresources;
@@ -1078,7 +1080,7 @@
              this.packRepository.setSelected(dataPacks);
              WorldDataConfiguration worlddataconfiguration = new WorldDataConfiguration(MinecraftServer.getSelectedPacks(this.packRepository, true), this.worldData.enabledFeatures());
  
-@@ -1952,7 +2405,7 @@
+@@ -1952,7 +2406,7 @@
              final List<String> list = Lists.newArrayList();
              final GameRules gamerules = this.getGameRules();
  
@@ -1087,7 +1089,7 @@
                  @Override
                  public <T extends GameRules.Value<T>> void visit(GameRules.Key<T> key, GameRules.Type<T> type) {
                      list.add(String.format(Locale.ROOT, "%s=%s\n", key.getId(), gamerules.getRule(key)));
-@@ -2058,7 +2511,7 @@
+@@ -2058,7 +2512,7 @@
              try {
                  label51:
                  {
@@ -1096,7 +1098,7 @@
  
                      try {
                          arraylist = Lists.newArrayList(NativeModuleLister.listModules());
-@@ -2108,6 +2561,22 @@
+@@ -2108,6 +2562,22 @@
  
      }
  
@@ -1119,7 +1121,7 @@
      private ProfilerFiller createProfiler() {
          if (this.willStartRecordingMetrics) {
              this.metricsRecorder = ActiveMetricsRecorder.createStarted(new ServerMetricsSamplersProvider(Util.timeSource, this.isDedicatedServer()), Util.timeSource, Util.ioPool(), new MetricsPersister("server"), this.onMetricsRecordingStopped, (path) -> {
-@@ -2225,18 +2694,24 @@
+@@ -2225,18 +2695,24 @@
      }
  
      public void logChatMessage(Component message, ChatType.Bound params, @Nullable String prefix) {