Optimize performance by using singletons for items

src/js/game/items/color_item.js

@@ -98,3 +98,13 @@ export class ColorItem extends BaseItem {
         context.fill();
     }
 }
+
+/**
+ * Singleton instances
+ * @type {Object<enumColors, ColorItem>}
+ */
+export const COLOR_ITEM_SINGLETONS = {};
+
+for (const color in enumColors) {
+    COLOR_ITEM_SINGLETONS[color] = new ColorItem(color);
+}

src/js/game/items/shape_item.js

@@ -37,7 +37,6 @@ export class ShapeItem extends BaseItem {
      */
     constructor(definition) {
         super();
-        // logger.log("New shape item for shape definition", definition.generateId(), "created");
 
         /**
          * This property must not be modified on runtime, you have to clone the class in order to change the definition