Add potential StartUpTime decrease by lazy loading commands only on usage

SpigotCore_Main/src/de/steamwar/command/SWCommand.java

@@ -34,6 +34,7 @@ import java.util.stream.Collectors;
 
 public abstract class SWCommand {
 
+    private boolean initialized = false;
     private final Command command;
     private final List<SubCommand> commandList = new ArrayList<>();
     private final List<SubCommand> commandHelpList = new ArrayList<>();
@@ -47,6 +48,9 @@ public abstract class SWCommand {
         this.command = new Command(command, "", "/" + command, Arrays.asList(aliases)) {
             @Override
             public boolean execute(CommandSender sender, String alias, String[] args) {
+                if (!initialized) {
+                    createMapping();
+                }
                 if (commandList.stream().anyMatch(s -> s.invoke(sender, args))) return false;
                 commandHelpList.stream().anyMatch(s -> s.invoke(sender, args));
                 return false;
@@ -54,6 +58,9 @@ public abstract class SWCommand {
 
             @Override
             public List<String> tabComplete(CommandSender sender, String alias, String[] args) throws IllegalArgumentException {
+                if (!initialized) {
+                    createMapping();
+                }
                 String string = args[args.length - 1].toLowerCase();
                 return commandList.stream()
                         .map(s -> s.tabComplete(sender, args))
@@ -66,7 +73,11 @@ public abstract class SWCommand {
         };
         unregister();
         register();
+    }
 
+    private synchronized void createMapping() {
+        Bukkit.getLogger().log(Level.INFO, () -> "Initializing: " + getClass().getTypeName());
+        long time = System.currentTimeMillis();
         Method[] methods = getClass().getDeclaredMethods();
         for (Method method : methods) {
             addMapper(Mapper.class, method, i -> i == 0, false, TypeMapper.class, (anno, typeMapper) -> {
@@ -123,6 +134,8 @@ public abstract class SWCommand {
             });
             commandHelpList.sort(Comparator.comparingInt(o -> -o.subCommand.length));
         }
+        Bukkit.getLogger().log(Level.INFO, () -> "Load time for " + getClass().getTypeName() + " was " + (System.currentTimeMillis() - time) + "ms");
+        initialized = true;
     }
 
     private <T extends Annotation> void add(Class<T> annotation, Method method, IntPredicate parameterTester, boolean firstParameter, Class<?> returnType, BiConsumer<T, Parameter[]> consumer) {