diff --git a/framework/lualib-src/lua-aoi/aoi.c b/framework/lualib-src/lua-aoi/aoi.c
index 9f1d156..60b785d 100644
--- a/framework/lualib-src/lua-aoi/aoi.c
+++ b/framework/lualib-src/lua-aoi/aoi.c
@@ -448,6 +448,7 @@ static int grid_add_obj(World *w, Grid *grid, int id, int x, int y, int is_maker
         hashtbl_insert(grid->watchers, obj->id, obj);
         hashtbl_upsert(w->watcher_grids, grid->idx, NULL);
     }
+    return 0;
 }
 
 static int grid_del_obj(World *w, Grid *grid, int id)
@@ -497,6 +498,7 @@ static int grid_del_obj(World *w, Grid *grid, int id)
             hashtbl_remove(w->watcher_grids, grid->idx);
         }
     }
+    return 0;
 }
 
 static void grid_update_obj(Grid *grid, int id)
diff --git a/framework/lualib-src/lua-aoi/utils.c b/framework/lualib-src/lua-aoi/utils.c
index 71c9720..fd146a2 100644
--- a/framework/lualib-src/lua-aoi/utils.c
+++ b/framework/lualib-src/lua-aoi/utils.c
@@ -112,7 +112,7 @@ int hashtbl_insert(HashTable *tbl, uint64_t key, void *value)
     {
         if (p->key == key)
         {
-            printf("table_insert fail, key<%lu>, already exist\n", key);
+            printf("table_insert fail, key<%llu>, already exist\n", key);
             assert(0);
             return 1;
         }
diff --git a/framework/lualib-src/lua-ecs/luaecs.c b/framework/lualib-src/lua-ecs/luaecs.c
index 5da1b6e..52e82e7 100644
--- a/framework/lualib-src/lua-ecs/luaecs.c
+++ b/framework/lualib-src/lua-ecs/luaecs.c
@@ -1549,12 +1549,65 @@ lremove(lua_State *L) {
 static int
 lsortkey(lua_State *L) {
 	struct entity_world *w = getW(L);
-	int oid = luaL_checkinteger(L, 2);
-	int cid = luaL_checkinteger(L, 3);
+	int oid = check_cid(L, w, 2);
+	int cid = check_cid(L, w, 3);
 	entity_sort_key_(w, oid, cid, L, 1);
 	return 0;
 }
 
+static int
+lbsearch(lua_State *L) {
+	struct entity_world *w = getW(L);
+	int sorted_id = check_cid(L, w, 2);
+	int value_id = check_cid(L, w, 3);
+	int value = luaL_checkinteger(L, 4);
+
+	struct component_pool *c = &w->c[sorted_id];
+
+	int begin = 0, end = c->n;
+
+	if (sorted_id == value_id) {
+		while (begin < end) {
+			int mid = (begin + end)/2;
+			int * v = entity_iter_(w, value_id, mid);
+			if (*v == value) {
+				// found
+				lua_createtable(L, 1, 0);
+				lua_pushinteger(L, mid);
+				lua_seti(L, -2, 1);
+				return 1;
+			}
+			if (*v < value) {
+				begin = mid + 1;
+			} else {
+				end = mid;
+			}
+		}
+	} else {
+		while (begin < end) {
+			int mid = (begin + end)/2;
+			int index = entity_sibling_index_(w, sorted_id, mid, value_id);
+			if (index == 0) {
+				return luaL_error(L, "Invalid value component");
+			}
+			int * v = entity_iter_(w, value_id, index - 1);
+			if (*v == value) {
+				// found
+				lua_createtable(L, 1, 0);
+				lua_pushinteger(L, index);
+				lua_seti(L, -2, 1);
+				return 1;
+			}
+			if (*v < value) {
+				begin = mid + 1;
+			} else {
+				end = mid;
+			}
+		}
+	}
+	return 0;
+}
+
 static int
 lobject(lua_State *L) {
 	struct group_iter *iter = luaL_checkudata(L, 1, "ENTITY_GROUPITER");
@@ -1654,6 +1707,7 @@ luaopen_ecs_core(lua_State *L) {
 			{ "_object", lobject },
 			{ "_sync", lsync },
 			{ "_release", lrelease },
+			{ "_bsearch", lbsearch },
 			{ NULL, NULL },
 		};
 		luaL_setfuncs(L,l,0);
diff --git a/framework/lualib/3rd/misc/ecs.lua b/framework/lualib/3rd/misc/ecs.lua
index a138f3d..8a4d755 100644
--- a/framework/lualib/3rd/misc/ecs.lua
+++ b/framework/lualib/3rd/misc/ecs.lua
@@ -49,7 +49,7 @@ local function cache_world(obj, k)
             id = tc.id,
             type = tc.type,
         }
-        local n = #tc
+        -- local n = #tc
         for i = 1, #tc do
             a[i] = tc[i]
         end
@@ -155,8 +155,8 @@ do -- newtype
     local function parse(s)
         -- s is "name:typename"
         local name, typename = s:match "^([%w_]+):(%w+)$"
-        local typeid = assert(typeid[typename])
-        return {typeid, name}
+        local tid = assert(typeid[typename])
+        return {tid, name}
     end
 
     local function align(c, field)
@@ -222,17 +222,17 @@ do -- newtype
     end
 end
 
-local function dump(obj)
-    for e, v in pairs(obj) do
-        if type(v) == "table" then
-            for k, v in pairs(v) do
-                print(e, k, v)
-            end
-        else
-            print(e, v)
-        end
-    end
-end
+-- local function dump(obj)
+-- 	for e,v in pairs(obj) do
+-- 		if type(v) == "table" then
+-- 			for k,v in pairs(v) do
+-- 				print(e,k,v)
+-- 			end
+-- 		else
+-- 			print(e,v)
+-- 		end
+-- 	end
+-- end
 
 function M:new(obj)
     --	dump(obj)
@@ -312,7 +312,7 @@ function M:sort(sorted, name)
     local ctx = context[self]
     local typenames = ctx.typenames
     local t = assert(typenames[name])
-    assert(t.type == typeid.int or (#t == 1 and t[1][1] == typeid.float))
+    assert(t.type == typeid.int or (#t == 1 and t[1][1] == typeid.int))
     local stype = typenames[sorted]
     if stype == nil then
         local id = ctx.id + 1
@@ -332,6 +332,13 @@ function M:sort(sorted, name)
     self:_sortkey(stype.id, t.id)
 end
 
+function M:bsearch(sorted, name, value)
+    local typenames = context[self].typenames
+    local sorted_id = typenames[sorted].id
+    local value_id = typenames[name].id
+    return self:_bsearch(sorted_id, value_id, value)
+end
+
 do
     local _object = M._object
     function M:object(name, refid, v)