chore: Abstract physics world tick optimizations

TODO.md

@@ -4,15 +4,15 @@
 - ✔ Synchronized should be a mixin
 - ✔ Behavior items should derive type/name
 - ✔ Precompile behavior traversals
-- ❌ Abstract physics world tick (no destructuring)
+- ✔ Abstract physics world tick optimizations
 - ❌ Cache current routine for Behaved tick
 - ✔ Apply patches to matter.js
   ( https://github.com/liabru/matter-js/pulls?utf8=%E2%9C%93&q=is%3Apr+author%3Abchevalier )
 - ✔ Inline traits into entity, remove Proxy
-- ❌ entityList.fromJSON()
 - ❌ Eliminate immutable.toJS()
 - ❌ Cache dirty entity state (entityList.tick())
 - ❌ Investigate visibleEntities path
 - ❌ Investigate lookupEmitListeners path
 - ❌ Investigate visibleBoundingBoxes path
 - ❌ EventEmitter::emit is too hot
+- ❌ entityList.fromJSON()

packages/physics/abstract/world.js

@@ -37,10 +37,13 @@ export class AbstractWorld extends decorate(class {}) {
     // Propagate position updates.
     for (let i = 0; i < this.entitiesList.length; ++i) {
       const entity = this.entitiesList[i];
-      const [entityX, entityY] = entity.position;
-      const [bodyX, bodyY] = entity.body.position;
+      const entityPosition = entity.position;
+      const bodyPosition = entity.body.position;
       // Hot.
-      if (entityX === bodyX && entityY === bodyY) {
+      if (
+        entityPosition[0] === bodyPosition[0]
+        && entityPosition[1] === bodyPosition[1]
+      ) {
         continue;
       }
       entity.position = entity.body.position;