diff --git a/scripts/base.js b/scripts/base.js
index 5489323..7ff195c 100644
--- a/scripts/base.js
+++ b/scripts/base.js
@@ -1176,6 +1176,13 @@ Object.defineProperty(Array.prototype, "mirrored", {
   },
 });
 
+Object.defineProperty(Array.prototype, "forEachRight", {
+  value: function(fn) {
+    for (var i = this.length-1; i >= 0; i--)
+      fn(this[i], i);
+  }
+});
+
 Math.lerp = vector.lerp;
 Math.gcd = vector.gcd;
 Math.lcm = vector.lcm;
diff --git a/scripts/entity.js b/scripts/entity.js
index 25d87e2..599b844 100644
--- a/scripts/entity.js
+++ b/scripts/entity.js
@@ -1,22 +1,5 @@
 globalThis.entityreport = {};
 
-var timer_manager = {};
-timer_manager.timers = new Map();
-timer_manager.make_timer = function(obj, fn, seconds)
-{
-  var timer = os.make_timer(_ => {
-    fn();
-    this.timers.delete(obj);
-  });
-
-  this.timers.set(obj, timer);
-  return _ => {
-    if (this.timers.has(obj)) {
-      
-    }
-  };
-}
-
 function obj_unique_name(name, obj) {
   name = name.replaceAll(".", "_");
   if (!(name in obj)) return name;
@@ -365,8 +348,7 @@ var entity = {
   kill() {
     if (this.__kill) return;
     this.__kill = true;
-
-    this.timers.forEach(x => x());
+    this.timers.forEachRight(x => x());
     delete this.timers;
     Event.rm_obj(this);
     input.do_uncontrol(this);
diff --git a/scripts/profile.js b/scripts/profile.js
index c2745e7..06eb9e6 100644
--- a/scripts/profile.js
+++ b/scripts/profile.js
@@ -337,29 +337,23 @@ var classes = ["gameobject", "transform", "dsp_node", "texture", "font", "warp_g
 var get_snapshot = function()
 {
  var snap = profile.snapshot;
- snap.actors ??= {};
- Object.assign(snap.actors, actor.__stats());
- snap.memory ??= {};
- Object.assign(snap.memory, os.mem());
+ snap.actors = actor.__stats();
+ snap.memory = os.mem();
  snap.memory.textures = game.texture.total_size();
  snap.memory.texture_vram = game.texture.total_vram();
 
- snap.rusage ??= {};
- var rusage = os.rusage();
- rusage.ru_maxrss *= 1024; // delivered in KB; convert here to B
- Object.assign(snap.rusage, rusage);
+ snap.rusage = os.rusage();
+ snap.rusage.ru_maxrss *= 1024; // delivered in KB; convert here to B
 
- snap.mallinfo ??= {};
- Object.assign(snap.mallinfo, os.mallinfo());
-
- snap.particles ??= {};
- Object.assign(snap.particles, stat_emitters());
+ snap.mallinfo = os.mallinfo();
+ snap.particles = stat_emitters();
 
  snap.obj ??= {};
  for (var i of classes) {
    var proto = globalThis[`${i}_proto`];
    if (!proto) continue;
    snap.obj[i] = proto._count();
+   snap.obj[i + "_mem"] = proto._count() * proto.memsize();
  }
 }
 
diff --git a/source/engine/jsffi.c b/source/engine/jsffi.c
index c5c2bbd..125ea19 100644
--- a/source/engine/jsffi.c
+++ b/source/engine/jsffi.c
@@ -14,6 +14,8 @@
 #include "datastream.h"
 #include "sound.h"
 #include "stb_ds.h"
+#define STB_RECT_PACK_IMPLEMENTATION
+#include "stb_rect_pack.h"
 #include "string.h"
 #include "window.h"
 #include "spline.h"
@@ -3363,7 +3365,38 @@ JSC_CCALL(os_skin_calculate,
   skin_calculate(sk);
 )
 
+JSC_CCALL(os_rectpack,
+  int width = js2number(argv[0]);
+  int height = js2number(argv[1]);
+  int num = js_arrlen(argv[2]);
+  stbrp_context ctx[1];
+  stbrp_rect rects[num];
+  
+  for (int i = 0; i < num; i++) {
+    HMM_Vec2 wh = js2vec2(js_getpropidx(argv[2], i));
+    rects[i].w = wh.x;
+    rects[i].h = wh.y;
+    rects[i].id = i;
+  }
+  
+  stbrp_node nodes[width];
+  stbrp_init_target(ctx, width, height, nodes, width);
+  int packed = stbrp_pack_rects(ctx, rects, num);
+  
+  if (!packed)
+    return JS_UNDEFINED;
+  
+  ret = JS_NewArray(js);
+  for (int i = 0; i < num; i++) {
+    HMM_Vec2 pos;
+    pos.x = rects[i].x;
+    pos.y = rects[i].y;
+    js_setprop_num(ret, i, vec22js(pos));
+  }
+)
+
 static const JSCFunctionListEntry js_os_funcs[] = {
+  MIST_FUNC_DEF(os, rectpack, 3),
   MIST_FUNC_DEF(os, cwd, 0),
   MIST_FUNC_DEF(os, rusage, 0),
   MIST_FUNC_DEF(os, mallinfo, 0),