diff --git a/core/handlers.py b/core/handlers.py
index c27460232a3dab2182b096bfc6210435342e1ff7..6deff67cc88bb276c85f7a60057993aaec4c1fb1 100644
--- a/core/handlers.py
+++ b/core/handlers.py
@@ -6,7 +6,8 @@ from bpy.app.handlers import persistent
 from sverchok import old_nodes
 from sverchok import data_structure
 from sverchok.core import upgrade_nodes, undo_handler_node_count
-from sverchok.core.update_system import set_first_run, clear_system_cache
+from sverchok.core.update_system import (
+    set_first_run, clear_system_cache, reset_timing_graphs)
 from sverchok.ui import color_def, bgl_callback_nodeview, bgl_callback_3dview
 from sverchok.utils import app_handler_ops
 from sverchok.utils.logging import debug
@@ -95,6 +96,7 @@ def sv_handler_undo_post(scene):
     gh.ContextTrees.reset_data()
 
 
+
 @persistent
 def sv_update_handler(scene):
     """
@@ -103,6 +105,8 @@ def sv_update_handler(scene):
     if not has_frame_changed(scene):
         return
 
+    reset_timing_graphs()
+
     for ng in sverchok_trees():
         try:
             # print('sv_update_handler')
diff --git a/core/update_system.py b/core/update_system.py
index 7cdd9ede69cff562f5c1c9f95c8ae0986d1eb31e..16e9bde9944eba053d49d8ec8f311385336c36e5 100644
--- a/core/update_system.py
+++ b/core/update_system.py
@@ -63,6 +63,10 @@ def update_error_colors(self, context):
     no_data_color = self.no_data_color[:]
     exception_color = self.exception_color[:]
 
+def reset_timing_graphs():
+    global graphs
+    graphs = []
+
 # cache node group update trees
 update_cache = {}
 # cache for partial update lists
diff --git a/utils/modules/shader_utils.py b/utils/modules/shader_utils.py
index ea45a91bd6c9f974fa968f34f8739f369c81fdf0..d26e5832dc9b3c297bb055b59bb8dd80d487b518 100644
--- a/utils/modules/shader_utils.py
+++ b/utils/modules/shader_utils.py
@@ -10,6 +10,7 @@ class ShaderLib2D():
         """
         docstring ?
         """
+        self.can_use_cache = False
         self.vectors = []
         self.vertex_colors = []
         self.indices = []
@@ -17,6 +18,10 @@ class ShaderLib2D():
         self.addc = self.vertex_colors.extend
         self.addi = self.indices.extend
 
+    def use_cached_canvas(self, geom):
+        self.add_data(geom.vectors, geom.vertex_colors, geom.indices)
+        self.can_use_cache = True
+
     def add_data(self, new_vectors=None, new_colors=None, new_indices=None):
         """
         input
@@ -39,6 +44,8 @@ class ShaderLib2D():
         | / |
         a - d
         """
+        if self.can_use_cache: return
+
         a = (x, y)
         b = (x, y - h)
         c = (x + w, y - h)