diff --git a/PanoPainter/GameViewController.m b/PanoPainter/GameViewController.m
index 00c4f75..51ce52c 100644
--- a/PanoPainter/GameViewController.m
+++ b/PanoPainter/GameViewController.m
@@ -468,16 +468,17 @@ std::set<UITouch*> ignored_touch;
 
         App::I.tick(dt.count());
 
-        [self async_lock];
         if (!(App::I.redraw || App::I.animate || !working_list.empty()))
         {
-            [self.context presentRenderbuffer:GL_FRAMEBUFFER];
-            [self async_unlock];
+            //[self.context presentRenderbuffer:GL_FRAMEBUFFER];
+            //[self async_unlock];
+            //[self->glview display];
             std::unique_lock<std::mutex> lock(render_mutex);
             render_cv.wait(lock);
             continue;
         }
 
+        [self async_lock];
         while (!working_list.empty())
         {
             working_list.front()();
@@ -486,8 +487,8 @@ std::set<UITouch*> ignored_touch;
         App::I.clear();
         App::I.update(elapsed);
         [self.context presentRenderbuffer:GL_FRAMEBUFFER];
-        [self async_unlock];
         [self->glview display];
+        [self async_unlock];
         elapsed = 0;
     }
 }
@@ -503,7 +504,7 @@ std::set<UITouch*> ignored_touch;
     }).detach();
     
     displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(tick)];
-    displayLink.frameInterval = 4;
+    displayLink.frameInterval = 1;
     [displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
 }