From 5f932db5f618af6854402dda9f4180684deec24a Mon Sep 17 00:00:00 2001
From: cha0s <git@cha0s.io>
Date: Wed, 17 Apr 2019 00:40:03 -0500
Subject: [PATCH] perf: various opts

---
 server/traits/informed.trait.js | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

diff --git a/server/traits/informed.trait.js b/server/traits/informed.trait.js
index 6c79673..7edea24 100644
--- a/server/traits/informed.trait.js
+++ b/server/traits/informed.trait.js
@@ -142,25 +142,20 @@ export class Informed extends decorate(Trait) {
     const room = this.entity.room;
     const camera = this.entity.camera;
     // Blow up camera rectangle to compensate for camera desync.
-    const position = Rectangle.position(camera.rectangle);
     const size = Rectangle.size(camera.rectangle);
-    const visibleArea = Rectangle.compose(
-      Vector.sub(
-        position,
-        Vector.scale(size, 0.25),
-      ),
+    const visibleArea =  Rectangle.expand(
+      camera.rectangle,
       Vector.scale(size, 1.5),
     );
     // Write over entity list for every layer.
     for (const {index, layer} of room.layers) {
       const visibleEntities = layer.visibleEntities(visibleArea);
-      let reducedEntityList = I.Map();
-      for (const entity of visibleEntities) {
-        reducedEntityList = reducedEntityList.set(
-          entity.instanceUuid,
-          entity.state,
-        );
+      const reduceEntityListRaw = {};
+      for (let i = 0; i < visibleEntities.length; ++i) {
+        const entity = visibleEntities[i];
+        reduceEntityListRaw[entity.instanceUuid] = entity.state;
       }
+      let reducedEntityList = I.Map(reduceEntityListRaw);
       const entityListPath = ['room', 'layers', index, 'entityList'];
       state = state.setIn(entityListPath, reducedEntityList);
     }