Cleanup, optimization

core/src/mindustry/async/AsyncProcess.java

@@ -3,17 +3,21 @@ package mindustry.async;
 public interface AsyncProcess{
 
     /** Sync. Called when the world loads. */
-    void init();
+    default void init(){}
 
     /** Sync. Called when the world resets. */
-    void reset();
+    default void reset(){}
 
     /** Sync. Called at the beginning of the main loop. */
-    void begin();
+    default void begin(){}
 
     /** Async. Called in a separate thread. */
-    void process();
+    default void process(){}
 
     /** Sync. Called in the end of the main loop. */
-    void end();
+    default void end(){}
+
+    default boolean shouldProcess(){
+        return true;
+    }
 }