Fix section resize performance

src/main/java/net/minestom/server/command/builder/Command.java

@@ -8,13 +8,16 @@ import net.minestom.server.command.builder.arguments.ArgumentDynamicWord;
 import net.minestom.server.command.builder.arguments.ArgumentType;
 import net.minestom.server.command.builder.arguments.minecraft.SuggestionType;
 import net.minestom.server.command.builder.condition.CommandCondition;
+import org.apache.commons.lang3.StringUtils;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import java.util.*;
+import java.util.function.Consumer;
 import java.util.function.Supplier;
+import java.util.stream.Stream;
 
 /**
  * Represents a command which has suggestion/auto-completion.
@@ -42,6 +45,7 @@ public class Command {
 
     private final String name;
     private final String[] aliases;
+    private final String[] names;
 
     private CommandExecutor defaultExecutor;
     private CommandCondition condition;
@@ -59,6 +63,7 @@ public class Command {
     public Command(@NotNull String name, @Nullable String... aliases) {
         this.name = name;
         this.aliases = aliases;
+        this.names = Stream.concat(Arrays.stream(aliases), Stream.of(name)).toArray(String[]::new);
 
         this.subcommands = new ArrayList<>();
         this.syntaxes = new ArrayList<>();
@@ -223,8 +228,7 @@ public class Command {
      *
      * @return the main command's name
      */
-    @NotNull
-    public String getName() {
+    public @NotNull String getName() {
         return name;
     }
 
@@ -233,11 +237,21 @@ public class Command {
      *
      * @return the command aliases, can be null or empty
      */
-    @Nullable
-    public String[] getAliases() {
+    public @Nullable String[] getAliases() {
         return aliases;
     }
 
+    /**
+     * Gets all the possible names for this command.
+     * <p>
+     * Include {@link #getName()} and {@link #getAliases()}.
+     *
+     * @return this command names
+     */
+    public @NotNull String[] getNames() {
+        return names;
+    }
+
     /**
      * Gets the default {@link CommandExecutor} which is called when there is no argument
      * or if no corresponding syntax has been found.
@@ -266,8 +280,7 @@ public class Command {
      * @return a collection containing all this command syntaxes
      * @see #addSyntax(CommandExecutor, Argument[])
      */
-    @NotNull
-    public Collection<CommandSyntax> getSyntaxes() {
+    public @NotNull Collection<CommandSyntax> getSyntaxes() {
         return syntaxes;
     }
 
@@ -280,8 +293,7 @@ public class Command {
      * @param text   the whole player's text
      * @return the array containing all the suggestion for the current arg (split SPACE), can be null
      */
-    @Nullable
-    public String[] onDynamicWrite(@NotNull CommandSender sender, @NotNull String text) {
+    public @Nullable String[] onDynamicWrite(@NotNull CommandSender sender, @NotNull String text) {
         return null;
     }
 
@@ -300,15 +312,29 @@ public class Command {
     public void globalListener(@NotNull CommandSender sender, @NotNull CommandContext context, @NotNull String command) {
     }
 
+    @Beta
+    public @NotNull Set<String> getSyntaxesStrings() {
+        Set<String> syntaxes = new HashSet<>();
+
+        Consumer<String> syntaxConsumer = syntaxString -> {
+            for (String name : getNames()) {
+                final String syntax = name + StringUtils.SPACE + syntaxString;
+                syntaxes.add(syntax);
+            }
+        };
+
+        this.subcommands.forEach(subcommand -> subcommand.getSyntaxesStrings().forEach(syntaxConsumer));
+
+        this.syntaxes.forEach(commandSyntax -> syntaxConsumer.accept(commandSyntax.getSyntaxString()));
+
+        return syntaxes;
+    }
+
     public static boolean isValidName(@NotNull Command command, @NotNull String name) {
-        if (command.getName().equals(name))
-            return true;
-        final String[] aliases = command.getAliases();
-        if (aliases == null)
-            return false;
-        for (String alias : aliases) {
-            if (alias.equals(name))
+        for (String commandName : command.getNames()) {
+            if (commandName.equals(name)) {
                 return true;
+            }
         }
         return false;
     }

src/main/java/net/minestom/server/instance/palette/Section.java

@@ -128,7 +128,7 @@ public class Section implements PublicCloneable<Section> {
         section.paletteBlockMap = paletteBlockMap;
         section.blockPaletteMap = blockPaletteMap;
 
-        for (int y = 0; y < Chunk.CHUNK_SIZE_Y; y++) {
+        for (int y = 0; y < Chunk.CHUNK_SECTION_SIZE; y++) {
             for (int x = 0; x < Chunk.CHUNK_SIZE_X; x++) {
                 for (int z = 0; z < Chunk.CHUNK_SIZE_Z; z++) {
                     final short blockId = getBlockAt(x, y, z);