diff --git a/scripts/actor.js b/scripts/actor.js
index f52613c..d0bc804 100644
--- a/scripts/actor.js
+++ b/scripts/actor.js
@@ -1,13 +1,40 @@
 var actor = {};
 
-actor.spawn = function(script, config, callback){
-  if (typeof script !== 'string') return undefined;
-  var padawan = Object.create(actor);
-  use(script, padawan);
+var actor_urs = {};
+
+globalThis.class_use = function(script, config, base, callback)
+{
+  if (!actor_urs[script]) {
+    var newur = Object.create(base);
+    actor_urs[script] = newur;
+  }
+
+  var padawan = Object.create(actor_urs[script]);
+
+  if (callback) callback(padawan);
 
   if (typeof config === 'object')
     Object.merge(padawan,config);
 
+  var file = Resources.find_script(script);
+  var script = Resources.replstrs(file);
+  script = `(function() {
+    var self = this;
+    var $ = this.__proto__;
+    ${script};
+  })`;
+  
+  var fn = os.eval(file,script);
+  fn.call(padawan);
+
+  return padawan;
+}
+
+actor.spawn = function(script, config){
+  if (typeof script !== 'string') return undefined;
+
+  var padawan = class_use(script, config, actor);
+  
   padawan.padawans = [];
   padawan.timers = [];
   padawan.master = this;
diff --git a/scripts/base.js b/scripts/base.js
index 02a9dd1..4b72f21 100644
--- a/scripts/base.js
+++ b/scripts/base.js
@@ -551,7 +551,7 @@ Object.defineProperty(Object.prototype, 'obscure', {
 Object.defineProperty(Object.prototype, 'mixin', {
   value: function(obj) {
     if (typeof obj === 'string')
-      obj = use(obj, this);
+      obj = use(obj);
       
     if (obj)
       Object.mixin(this, obj);
@@ -1418,8 +1418,7 @@ bbox.fromobjs = function(objs)
 
 /* VECTORS */
 var Vector = {};
-Vector.length = function(v) { return Math.hypot(...v); }
-
+Vector.length = vector.length;
 Vector.norm = vector.norm;
 Vector.project = vector.project;
 Vector.dot = vector.dot;
diff --git a/scripts/engine.js b/scripts/engine.js
index 1f3a6e2..09cb7c4 100644
--- a/scripts/engine.js
+++ b/scripts/engine.js
@@ -1,5 +1,8 @@
 "use math";
 
+prosperon.gc_start = function(){}
+prosperon.gc_end = function(){}
+
 Object.defineProperty(String.prototype, 'rm', {
   value: function(index, endidx = index+1) { return this.slice(0,index) + this.slice(endidx); }
 });
@@ -223,37 +226,38 @@ globalThis.global = globalThis;
 
 var use_cache = {};
 
-globalThis.use = function use(file, env = {}, script) {
+globalThis.use = function use(file) {
   file = Resources.find_script(file);
   profile.cache("USE", file);
 
   if (use_cache[file]) {
-    var ret = use_cache[file].call(env);
-    return;
+    var ret = use_cache[file]();
+    profile.endcache(" [cached]");
+    return ret;
   }
-  script ??= Resources.replstrs(file);
-
+  
+  var script = Resources.replstrs(file);
   script = `(function() { var self = this; ${script}; })`;
   var fn = os.eval(file, script);
   use_cache[file] = fn;
-  var ret = fn.call(env);
+  var ret = fn();
   profile.endcache();
-  
+
   return ret;
 }
 
-function stripped_use (file, env = {}, script) {
+function stripped_use (file, script) {
   file = Resources.find_script(file);
 
   if (use_cache[file]) {
-    var ret = use_cache[file].call(env);
-    return;
+    var ret = use_cache[file]();
+    return ret;
   }
   script ??= Resources.replstrs(file);
 
   script = `(function() { var self = this; ${script}; })`;
   var fn = os.eval(file, script);
-  var ret = fn.call(env);
+  var ret = fn();
   profile.endcache();
   
   return ret;
@@ -264,7 +268,7 @@ function bare_use(file)
   var script = io.slurp(file);
   if (!script) return;
   script = `(function() { var self = this; ${script}; })`;
-  Object.assign(globalThis, os.eval(file, script).call(globalThis));
+  Object.assign(globalThis, os.eval(file, script)());
 }
 
 globalThis.debug = {};
diff --git a/scripts/entity.js b/scripts/entity.js
index 0c392bb..b1c08d7 100644
--- a/scripts/entity.js
+++ b/scripts/entity.js
@@ -146,16 +146,15 @@ var entity = {
   },
   
   spawn(text, config, callback) {
-
-    var ent = Object.create(entity);
-    ent.transform = os.make_transform();
-    
-    ent.guid = prosperon.guid();
-    
-    ent.components = {};
-    ent.objects = {};
-    ent.timers = {};
-    
+    var ent = class_use(text, config, entity, function(ent) {
+      ent.transform = os.make_transform();
+      ent.guid = prosperon.guid();
+      ent.components = {};
+      ent.objects = {};
+      ent.timers = {};
+      ent.ur = {};
+    });
+/*    
     if (!text)
       ent.ur = emptyur;
     else if (text instanceof Object) {// assume it's an ur
@@ -168,13 +167,7 @@ var entity = {
       text = ent.ur.text;
       config = [ent.ur.data, config];
     }
-    
-    if (typeof text === 'string')
-      use(text, ent);
-    else if (Array.isArray(text))
-      for (var path of text) use(path,ent);
-    profile.cache("ENTITY TIME", ent.ur.name);
-    var st = profile.now();  
+
     if (typeof config === 'string')
       Object.merge(ent, json.decode(Resources.replstrs(config)));
     else if (Array.isArray(config))
@@ -186,7 +179,16 @@ var entity = {
         else if (path instanceof Object)
           Object.merge(ent,path);
       };
-      
+    
+    if (typeof text === 'string') {
+      class_use(
+      use(text, ent);
+    }
+    else if (Array.isArray(text))
+      for (var path of text) use(path,ent);
+    profile.cache("ENTITY TIME", ent.ur.name);
+*/
+
     ent.reparent(this);
 
     for (var [prop, p] of Object.entries(ent)) {
diff --git a/scripts/mum.js b/scripts/mum.js
index 0b49265..d02cf26 100644
--- a/scripts/mum.js
+++ b/scripts/mum.js
@@ -76,7 +76,7 @@ var pre = function(data)
   if (data.pos) cursor = data.pos.slice();
   data.drawpos = cursor.slice().add(data.offset);
 
-  if (data.opacity !== 1) {
+  if (data.opacity && data.opacity !== 1) {
     data.color = data.color.slice();
     data.color[3] = data.opacity;
   }
diff --git a/scripts/profile.js b/scripts/profile.js
index 1367ad5..935cf80 100644
--- a/scripts/profile.js
+++ b/scripts/profile.js
@@ -16,6 +16,7 @@ function calc_cpu(fn, times, diff=0)
 function empty_fn() {}
 
 profile.cpu = function profile_cpu(fn, times = 1, q = "unnamed") {
+  var retgather = gathering_cpu;
   profile.gather_stop();
   var empty = calc_cpu(empty_fn, 100000);
   var mean = Math.mean(empty);
@@ -26,7 +27,10 @@ profile.cpu = function profile_cpu(fn, times = 1, q = "unnamed") {
   var totalt = profile.best_t(elapsed);
   
   say(`profile [${q}]: ${avgt} ± ${profile.best_t(Math.ci(series))} [${totalt} for ${times} loops]`);
-  start_prof_gather();
+  say(`result of function is ${fn()}`);
+  
+  if (retgather)
+    profile.start_prof_gather();
 }
 
 profile.ms = function(t) { return t/1000000; }
@@ -277,3 +281,25 @@ function printreport(cache, name) {
 
   return report;
 };
+
+profile.best_mem = function(bytes)
+{
+  var sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB'];
+  if (bytes == 0) return '0 Bytes';
+  var i = parseInt(Math.floor(Math.log(bytes) / Math.log(1024)));
+  return (bytes / Math.pow(1024, i)).toPrecision(3) + ' ' + sizes[i];
+}
+
+profile.print_mem = function()
+{
+  var mem = os.mem();
+  say('total memory used: ' + profile.best_mem(mem.memory_used_size));
+  delete mem.memory_used_size;
+  delete mem.malloc_size;
+  for (var i in mem) {
+    if (i.includes("size"))
+      say("  " + i + " :: " + profile.best_mem(mem[i]));
+  }
+}
+
+return {profile};
diff --git a/scripts/render.js b/scripts/render.js
index 1de71f3..df96e8f 100644
--- a/scripts/render.js
+++ b/scripts/render.js
@@ -920,10 +920,13 @@ prosperon.render = function()
   render.end_pass();
 
   profile.endframe();
-
-  profile.frame("post process");
+  profile.endframe();
+  profile.endframe();
   /* draw the image of the game world first */
   render.glue_pass();
+  profile.frame("frame");
+  profile.frame("render");
+  profile.frame("post process");  
   render.viewport(...prosperon.camera.view());
   render.use_shader(render.postshader);
   render.use_mat({diffuse:prosperon.screencolor});
@@ -1002,6 +1005,4 @@ prosperon.process = function process() {
   profile.endframe();
 }
 
-
-
 return {render};
diff --git a/scripts/std.js b/scripts/std.js
index 23af7f2..3f76812 100644
--- a/scripts/std.js
+++ b/scripts/std.js
@@ -15,9 +15,11 @@ if (os.sys() === 'macos') {
 }
 
 //appy.inputs.f12 = function() { mum.debug = !mum.debug; }
-appy.inputs.f12 = function() { profile.cpu_frame(); }
-appy.inputs.f11 = window.toggle_fullscreen;
+
+appy.inputs.f9 = function() { profile.print_mem(); }
 appy.inputs.f10 = function() { profile.toggle_frame_avg(); }
+appy.inputs.f11 = window.toggle_fullscreen;
+appy.inputs.f12 = function() { profile.cpu_frame(); }
 appy.inputs['M-f4'] = prosperon.quit;
 
 player[0].control(appy);
@@ -240,7 +242,7 @@ Cmdline.register_order("play", function(argv) {
   if (argv[0])
     io.chdir(argv[0]);
     
-  game.loadurs();
+//  game.loadurs();
 
   if (!io.exists(projectfile)) {
     say("No game to play. Try making one with 'prosperon init'.");
@@ -320,7 +322,7 @@ Cmdline.register_order("about", function(argv) {
 }, "Get information about this game.");
 
 Cmdline.register_order("ur", function(argv) {
-  game.loadurs();
+//  game.loadurs();
   for (var i of ur._list.sort()) say(i);
 }, "Get information about the ur types in your game.");
 
diff --git a/source/engine/jsffi.c b/source/engine/jsffi.c
index f17d22b..91476aa 100644
--- a/source/engine/jsffi.c
+++ b/source/engine/jsffi.c
@@ -33,6 +33,7 @@
 #include "par/par_shapes.h"
 #include "sokol_glue.h"
 #include <chipmunk/chipmunk_unsafe.h>
+#include <chipmunk/chipmunk_structs.h>
 #include "gui.h"
 #include "timer.h"
 
@@ -1315,6 +1316,21 @@ JSC_CCALL(vector_angledist,
   return number2js(dist);
 )
 
+JSC_CCALL(vector_length,
+  int len = js_arrlen(argv[0]);
+  switch(len) {
+    case 2: return number2js(HMM_LenV2(js2vec2(argv[0])));
+    case 3: return number2js(HMM_LenV3(js2vec3(argv[0])));
+    case 4: return number2js(HMM_LenV4(js2vec4(argv[0])));
+  }
+
+  double sum = 0;
+  for (int i = 0; i < len; i++)
+    sum += pow(js2number(js_getpropidx(argv[0], i)), 2);
+
+  return number2js(sqrt(sum));
+)
+
 double r2()
 {
     return (double)rand() / (double)RAND_MAX ;
@@ -1415,7 +1431,8 @@ static const JSCFunctionListEntry js_vector_funcs[] = {
   MIST_FUNC_DEF(vector, mean, 1),
   MIST_FUNC_DEF(vector, sum, 1),
   MIST_FUNC_DEF(vector, sigma, 1),
-  MIST_FUNC_DEF(vector, median, 1)
+  MIST_FUNC_DEF(vector, median, 1),
+  MIST_FUNC_DEF(vector, length, 1)
 };
 
 #define JS_HMM_FN(OP, HMM, SIGN) \
@@ -2501,6 +2518,46 @@ JSC_CCALL(os_quit, quit();)
 JSC_CCALL(os_exit, exit(js2number(argv[0]));)
 JSC_CCALL(os_reindex_static, cpSpaceReindexStatic(space));
 JSC_CCALL(os_gc, script_gc());
+JSC_CCALL(os_mem_limit, script_mem_limit(js2number(argv[0])))
+JSC_CCALL(os_gc_threshold, script_gc_threshold(js2number(argv[0])))
+JSC_CCALL(os_max_stacksize, script_max_stacksize(js2number(argv[0])))
+
+#define JSOBJ_ADD_FIELD(OBJ, STRUCT, FIELD, TYPE) \
+js_setpropstr(OBJ, #FIELD, TYPE##2js(STRUCT.FIELD));\
+
+#define JSJMEMRET(FIELD) JSOBJ_ADD_FIELD(ret, jsmem, FIELD, number)
+
+JSC_CCALL(os_mem,
+  JSMemoryUsage jsmem;
+  JS_ComputeMemoryUsage(rt, &jsmem);
+  ret = JS_NewObject(js);
+  JSJMEMRET(malloc_size)
+  JSJMEMRET(malloc_limit)
+  JSJMEMRET(memory_used_size)
+  JSJMEMRET(memory_used_count)
+  JSJMEMRET(atom_count)
+  JSJMEMRET(atom_size)
+  JSJMEMRET(str_count)
+  JSJMEMRET(str_size)
+  JSJMEMRET(obj_count)
+  JSJMEMRET(obj_size)
+  JSJMEMRET(prop_count)
+  JSJMEMRET(prop_size)
+  JSJMEMRET(shape_count)
+  JSJMEMRET(shape_size)
+  JSJMEMRET(js_func_count)
+  JSJMEMRET(js_func_size)
+  JSJMEMRET(js_func_code_size)
+  JSJMEMRET(js_func_pc2line_count)
+  JSJMEMRET(js_func_pc2line_size)
+  JSJMEMRET(c_func_count)
+  JSJMEMRET(array_count)
+  JSJMEMRET(fast_array_count)
+  JSJMEMRET(fast_array_elements)
+  JSJMEMRET(binary_object_count)
+  JSJMEMRET(binary_object_size)
+)
+
 JSC_SSCALL(os_eval, ret = script_eval(str, str2))
 
 JSC_CCALL(os_make_body,
@@ -2618,6 +2675,13 @@ JSC_CCALL(os_make_circle2d,
   return ret;
 )
 
+JSC_CCALL(os_make_timer, return timer2js(timer_make()))
+JSC_CCALL(os_update_timers, timer_update(js2number(argv[0])))
+
+JSC_CCALL(os_obj_size,
+  
+)
+
 JSC_CCALL(poly2d_setverts,
   cpShape *s = js2cpShape(self);
   HMM_Vec2 *v = js2cpvec2arr(argv[0]);
@@ -2938,6 +3002,12 @@ static const JSCFunctionListEntry js_os_funcs[] = {
   MIST_FUNC_DEF(os, make_hemisphere, 2),
   MIST_FUNC_DEF(os, make_plane, 2),
   MIST_FUNC_DEF(os, make_video, 1),
+  MIST_FUNC_DEF(os, make_timer, 0),
+  MIST_FUNC_DEF(os, update_timers, 1),
+  MIST_FUNC_DEF(os, mem, 1),
+  MIST_FUNC_DEF(os, mem_limit, 1),
+  MIST_FUNC_DEF(os, gc_threshold, 1),
+  MIST_FUNC_DEF(os, max_stacksize, 1)
 };
 
 #include "steam.h"
diff --git a/source/engine/jsffi.h b/source/engine/jsffi.h
index c36aafa..adf4904 100644
--- a/source/engine/jsffi.h
+++ b/source/engine/jsffi.h
@@ -110,6 +110,7 @@ JSValue TYPE##2js(TYPE *n) { \
   return j; }\
 \
 static JSValue js_##TYPE##_memid (JSContext *js, JSValue self) { return str2js("%p", js2##TYPE(self)); } \
+static JSValue js_##TYPE##_memsize (JSContext *js, JSValue self) { return number2js(sizeof(TYPE)); } \
 
 #define QJSGLOBALCLASS(NAME) \
 JSValue NAME = JS_NewObject(js); \
@@ -126,6 +127,7 @@ QJSCLASSPREP(TYPE); \
 JSValue TYPE##_proto = JS_NewObject(js); \
 JS_SetPropertyFunctionList(js, TYPE##_proto, js_##TYPE##_funcs, countof(js_##TYPE##_funcs)); \
 JS_SetPropertyStr(js, TYPE##_proto, "memid", JS_NewCFunction(js, &js_##TYPE##_memid, "memid", 0)); \
+JS_SetPropertyStr(js, TYPE##_proto, "memsize", JS_NewCFunction(js, &js_##TYPE##_memsize, "memsize", 0)); \
 JS_SetClassProto(js, js_##TYPE##_id, TYPE##_proto); \
 
 #define countof(x) (sizeof(x)/sizeof((x)[0]))
diff --git a/source/engine/script.c b/source/engine/script.c
index af6c0f0..8e4f1a8 100644
--- a/source/engine/script.c
+++ b/source/engine/script.c
@@ -16,6 +16,9 @@ JSRuntime *rt = NULL;
 #define JS_EVAL_FLAGS JS_EVAL_FLAG_STRICT | JS_EVAL_FLAG_STRIP 
 #endif
 
+static JSValue start_gc;
+static JSValue end_gc;
+
 void script_startup() {
   rt = JS_NewRuntime();
   js = JS_NewContext(rt);
@@ -44,6 +47,9 @@ return;
 }
 
 void script_gc() { JS_RunGC(rt); }
+void script_mem_limit(size_t limit) { JS_SetMemoryLimit(rt, limit); }
+void script_gc_threshold(size_t threshold) { JS_SetGCThreshold(rt, threshold); }
+void script_max_stacksize(size_t size) { JS_SetMaxStackSize(rt, size);  }
 
 void js_stacktrace() {
   if (!js) return;
@@ -52,6 +58,7 @@ void js_stacktrace() {
 #endif
 }
 
+
 void script_evalf(const char *format, ...)
 {
   JSValue obj;
diff --git a/source/engine/script.h b/source/engine/script.h
index ecf77a9..654edff 100644
--- a/source/engine/script.h
+++ b/source/engine/script.h
@@ -30,6 +30,9 @@ JSValue script_eval(const char *file, const char *script);
 void script_call_sym(JSValue sym, int argc, JSValue *argv);
 
 void script_gc();
+void script_mem_limit(size_t limit);
+void script_gc_threshold(size_t threshold);
+void script_max_stacksize(size_t size);
 
 #ifdef __cplusplus
 }
diff --git a/source/engine/thirdparty/quickjs/quickjs.c b/source/engine/thirdparty/quickjs/quickjs.c
index abf9eb5..7e3c834 100644
--- a/source/engine/thirdparty/quickjs/quickjs.c
+++ b/source/engine/thirdparty/quickjs/quickjs.c
@@ -32,6 +32,7 @@
 #include <time.h>
 #include <fenv.h>
 #include <math.h>
+#include <script.h>
 #if defined(__APPLE__)
 #include <malloc/malloc.h>
 #elif defined(__linux__) || defined(__GLIBC__)
@@ -112,6 +113,22 @@ void quickjs_set_dumpout(FILE *f)
 //#define DUMP_PROMISE
 //#define DUMP_READ_OBJECT
 
+#ifdef DUMP
+//#define DUMP_FREE
+//#define DUMP_MEM
+//#define DUMP_CLOSURE
+#define DUMP_GC
+//#define DUMP_GC_FREE
+#define DUMP_LEAKS 1
+//#define DUMP_OBJECTS
+#define DUMP_CLOSURE
+//#define DUMP_OBJECTS
+//#define DUMP_ATOMS
+//#define DUMP_SHAPES
+//#define DUMP_MODULE_RESOLVE
+//#define DUMP_PROMISE
+#endif
+
 /* test the GC by forcing it before each object allocation */
 //#define FORCE_GC_AT_MALLOC
 
diff --git a/source/engine/timer.c b/source/engine/timer.c
index 276a2b8..f0df0a5 100644
--- a/source/engine/timer.c
+++ b/source/engine/timer.c
@@ -1,22 +1,33 @@
 #include "timer.h"
-
+#include <stdio.h>
 #include "stb_ds.h"
 
-timer *timers;
+timer **timers;
 
 timer *timer_make()
 {
-  return NULL;
+  timer *t = calloc(sizeof(*t),1);
+  arrput(timers, t);
+  return t;
 }
 
 void timer_free(timer *t)
 {
-  
+  printf("before free arrlen if timers is now %d\n", arrlen(timers));
+  for (int i = 0; i < arrlen(timers); i++) {
+    if (timers[i] == t) {
+      arrdelswap(timers,i);
+      break;
+    }
+  }
+      
+  free(t);
+  printf("arrlen if timers is now %d\n", arrlen(timers));
 }
 
 void timer_update(double dt)
 {
   for (int i = 0; i < arrlen(timers); i++) {
-    timers[i].remain -= dt;
+    timers[i]->remain -= dt;
   }
-}
\ No newline at end of file
+}
diff --git a/source/engine/timer.h b/source/engine/timer.h
index 590ee0f..b425b47 100644
--- a/source/engine/timer.h
+++ b/source/engine/timer.h
@@ -5,9 +5,8 @@ typedef struct timer {
   double remain;
 } timer;
 
-
 timer *timer_make();
 void timer_free(timer *t);
 void timer_update(double dt);
 
-#endif
\ No newline at end of file
+#endif