diff --git a/debian/changelog b/debian/changelog
index 2f8ebfb..e7bce47 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -4,6 +4,7 @@ instead (1.2.1) unstable; urgency=low
   * fading fix;
   * fix in disable autosave;
   * disp fix;
+  * savevars optimization;
 
  -- Peter Kosyh <p.kosyh@gmail.com>  Sat, 28 Aug 2010 19:47:00 +0300  
 
diff --git a/stead/stead.lua b/stead/stead.lua
index 051d60e..1e26cae 100644
--- a/stead/stead.lua
+++ b/stead/stead.lua
@@ -1701,6 +1701,7 @@ function gamefile(file, forget)
 		set_music();
 		set_sound();
 		timer:stop();
+		variables = nil
 		init = function() -- null init function
 		end
 		for_each_object(function(k, o) -- destroy all objects
diff --git a/stead/vars.lua b/stead/vars.lua
index d240068..8c147f5 100644
--- a/stead/vars.lua
+++ b/stead/vars.lua
@@ -1,11 +1,8 @@
 function isForSave(k, v, s) -- k - key, v - value, s -- parent table
 	local i,o
-	if type(s.variables) == 'table' then
-		for i,o in ipairs(s.variables) do
-			if o == k then
-				return true
-			end
-		end
+	if type(s.variables_save) == 'table' and 
+		s.variables_save[k] then
+			return true
 	end
 	if type(k) == 'function' then
 		return false
@@ -24,7 +21,7 @@ function __vars_add(s, v, set)
 		elseif s.variables[k] then
 			error ("Variable overwrites variables object: "..tostring(k))
 		elseif k ~= 'variable_type' then
-			if set and (type(o) == 'string' or type(o) == 'boolean' or type(o) == 'number') then 
+			if set and not isObject(o) then 
 				if s[k] then
 					error ("Global variable conflict: "..tostring(k));
 				end
@@ -52,6 +49,7 @@ function __vars_fill(v)
 	if type(v.variables) == 'table' then
 		local k,o
 		local vars = {}
+		v.variables_save = {}
 		for k,o in pairs(v.variables) do
 			if tonumber(k) and type(o) == 'string' then
 				stead.table.insert(vars, o)
@@ -63,6 +61,9 @@ function __vars_fill(v)
 				stead.table.insert(vars, k);
 			end
 		end
+		for k,o in ipairs(vars) do
+			v.variables_save[o] = true
+		end
 		v.variables = vars;
 	end
 end