perf: initialize

app/ecs/component.js

@@ -37,9 +37,31 @@ export default class Component {
       return [];
     }
     const allocated = this.allocateMany(entries.length);
-    const {properties} = this.constructor.schema.specification.concrete;
-    const Schema = this.constructor.schema.constructor;
-    const keys = new Set(Object.keys(properties));
+    const {
+      constructor: Schema,
+      specification: {concrete: {properties}},
+    } = this.constructor.schema;
+    const defaults = {};
+    for (const key in properties) {
+      defaults[key] = ((key) => () => Schema.defaultValue(properties[key]))(key);
+      switch (properties[key].type) {
+        case 'float32':
+        case 'float64':
+        case 'int8':
+        case 'int16':
+        case 'int32':
+        case 'int64':
+        case 'string':
+        case 'uint8':
+        case 'uint16':
+        case 'uint32':
+        case 'uint64': {
+          defaults[key] = defaults[key]();
+          break;
+        }
+      }
+    }
+    const keys = new Set(Object.keys(defaults));
     const promises = [];
     for (let i = 0; i < entries.length; ++i) {
       const [entityId, values] = entries[i];
@@ -48,15 +70,14 @@ export default class Component {
       this.instances[entityId] = instance;
       for (const key in values) {
         keys.delete(key);
-        instance[key] = values[key];
       }
+      const defaultValues = {};
       for (const key of keys) {
-        const defaultValue = Schema.defaultValue(properties[key]);
-        if ('undefined' !== typeof defaultValue) {
-          instance[`$$${key}`] = defaultValue;
-          instance[key] = defaultValue;
-        }
+        defaultValues[key] = 'function' === typeof defaults[key]
+          ? defaults[key]()
+          : defaults[key];
       }
+      instance.initialize(values, defaultValues);
       promises.push(this.load(instance));
     }
     await Promise.all(promises);
@@ -114,6 +135,14 @@ export default class Component {
     const Instance = class {
       $$entity = 0;
       destroy() {}
+      initialize(values, defaults) {
+        for (const key in values) {
+          this[`$$${key}`] = values[key];
+        }
+        for (const key in defaults) {
+          this[`$$${key}`] = defaults[key];
+        }
+      }
       toNet(recipient, data) {
         return data || Component.constructor.filterDefaults(this);
       }

app/ecs/components/sprite.js

@@ -70,6 +70,19 @@ export default class Sprite extends Component {
         const [, s, l] = hexToHsl(this.$$tint);
         this.tint = hslToHex(hue, s, l);
       }
+      initialize(values, defaults) {
+        let {
+          anchorX = defaults.anchorX,
+          anchorY = defaults.anchorY,
+          frame = defaults.frame,
+          scaleX = defaults.scaleX,
+          scaleY = defaults.scaleY,
+        } = values;
+        this.$$anchor = {x: anchorX, y: anchorY};
+        this.$$scale = {x: scaleX, y: scaleY};
+        super.initialize(values, defaults);
+        this.frame = frame;
+      }
       get lightness() {
         return this.$$lightness;
       }

app/ecs/schema.js

@@ -35,6 +35,7 @@ export default class Schema {
     return {
       $: this.$$types[type],
       concrete: $$type.normalize ? $$type.normalize(rest) : rest,
+      type,
     };
   }