perf: micro

app/ecs/component.js

@@ -2,10 +2,9 @@ import Schema from './schema.js';
 
 export default class Component {
 
-  data = [];
   ecs;
   Instance;
-  map = {};
+  instances = {};
   pool = [];
   static properties = {};
   static $$schema;
@@ -15,19 +14,6 @@ export default class Component {
     this.Instance = this.instanceFromSchema();
   }
 
-  allocateMany(count) {
-    const results = [];
-    while (count > 0) {
-      results.push(
-        this.pool.length > 0
-          ? this.pool.pop()
-          : this.data.push(new this.Instance()) - 1,
-      )
-      count -= 1;
-    }
-    return results;
-  }
-
   async create(entityId, values) {
     const [created] = await this.createMany([[entityId, values]]);
     return created;
@@ -37,36 +23,28 @@ export default class Component {
     if (0 === entries.length) {
       return [];
     }
-    const allocated = this.allocateMany(entries.length);
-    const {properties} = this.constructor.schema.specification.concrete;
-    const Schema = this.constructor.schema.constructor;
-    const keys = Object.keys(properties);
+    let {length} = entries;
+    const allocated = [];
+    while (length > 0) {
+      allocated.push(
+        this.pool.length > 0
+          ? this.pool.pop()
+          : new this.Instance(),
+      )
+      length -= 1;
+    }
     const promises = [];
-    for (let i = 0; i < entries.length; ++i) {
-      const [entityId, values = {}] = entries[i];
-      this.map[entityId] = allocated[i];
-      this.data[allocated[i]].entity = entityId;
-      for (let k = 0; k < keys.length; ++k) {
-        const j = keys[k];
-        const instance = this.data[allocated[i]];
-        if (j in values) {
-          instance[j] = values[j];
-        }
-        else {
-          const defaultValue = Schema.defaultValue(properties[j]);
-          if ('undefined' !== typeof defaultValue) {
-            instance[j] = defaultValue;
-          }
-        }
+    for (const [entityId, values] of entries) {
+      const instance = allocated.pop();
+      this.instances[entityId] = instance;
+      instance.entity = entityId;
+      for (const key in values) {
+        instance[key] = values[key];
       }
-      promises.push(this.load(this.data[allocated[i]]));
+      promises.push(this.load(instance));
     }
     await Promise.all(promises);
-    const created = [];
-    for (let i = 0; i < allocated.length; ++i) {
-      created.push(this.data[allocated[i]]);
-    }
-    return created;
+    return allocated;
   }
 
   deserialize(entityId, view, offset) {
@@ -82,19 +60,19 @@ export default class Component {
     this.destroyMany([entityId]);
   }
 
-  destroyMany(entities) {
+  destroyMany(entityIds) {
     this.freeMany(
-      entities
+      entityIds
         .map((entityId) => {
-          if ('undefined' !== typeof this.map[entityId]) {
-            return this.map[entityId];
+          if ('undefined' !== typeof this.instances[entityId]) {
+            return this.instances[entityId];
           }
           throw new Error(`can't free for non-existent id ${entityId}`);
         }),
     );
-    for (let i = 0; i < entities.length; i++) {
-      this.data[this.map[entities[i]]].destroy();
-      this.map[entities[i]] = undefined;
+    for (const entityId of entityIds) {
+      this.instances[entityId].destroy();
+      delete this.instances[entityId];
     }
   }
 
@@ -110,14 +88,12 @@ export default class Component {
     return json;
   }
 
-  freeMany(indices) {
-    for (let i = 0; i < indices.length; ++i) {
-      this.pool.push(indices[i]);
-    }
+  freeMany(instances) {
+    this.pool.push(...instances);
   }
 
   get(entityId) {
-    return this.data[this.map[entityId]];
+    return this.instances[entityId];
   }
 
   async insertMany(entities) {