diff --git a/terminalplotter.py b/terminalplotter.py
index bc2afe5..625775b 100644
--- a/terminalplotter.py
+++ b/terminalplotter.py
@@ -11,6 +11,7 @@ import pyvista as pv
 
 import kitty
 
+import numpy as np
 
 class TerminalPlotter(pv.Plotter):
     def __init__(self, width, height, **kwargs):
@@ -21,11 +22,9 @@ class TerminalPlotter(pv.Plotter):
         # setup vtk rendering chain
         self.w2i_filter = vtk.vtkWindowToImageFilter()
         self.w2i_filter.SetInputBufferTypeToRGBA()
-        self.w2i_filter.ReadFrontBufferOff()
+        #self.w2i_filter.ReadFrontBufferOff()
+        self.w2i_filter.ReadFrontBufferOn()
         self.w2i_filter.SetInput(self.ren_win)
-        self.writer = vtk.vtkPNGWriter()
-        self.writer.WriteToMemoryOn()
-        self.writer.SetInputConnection(self.w2i_filter.GetOutputPort())
         # enable transparency
         self.set_background([0.0, 0.0, 0.0])
         self.ren_win.SetAlphaBitPlanes(1)
@@ -80,14 +79,25 @@ class TerminalPlotter(pv.Plotter):
             termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
 
     async def _render_loop(self):
+        import time
         while self._running:
+            start = time.perf_counter()
             # keep renedring the scene
             self.ren_win.Render()
             # Update the filter to grab the current buffer
             self.w2i_filter.Modified()
             self.w2i_filter.Update()
-            self.writer.Write()
-            await kitty.draw_to_terminal(self.writer.GetResult())
+            vtk_image = self.w2i_filter.GetOutput()
+            width, height, _ = vtk_image.GetDimensions()
+            vtk_array = vtk_image.GetPointData().GetScalars()
+            np_image = numpy_support.vtk_to_numpy(vtk_array).reshape(height, width, 4)
+            np_image = np_image[::-1]  # Flip vertically
+            np_image = np.ascontiguousarray(np_image)    # Ensure memory layout is C-contiguous
+            print("Render & copy:", time.perf_counter() - start)
+
+            #await kitty.draw_to_terminal(np_image, width, height, compress=True)
+            await kitty.draw_to_terminal(np_image, width, height, use_shm=True)
+            print("Draw:", time.perf_counter() - start)
             kitty.set_position(self.start_y, self.start_x)
             self.camera.Azimuth(1)
 
@@ -99,4 +109,14 @@ class TerminalPlotter(pv.Plotter):
             asyncio.create_task(self._render_loop()),
         ]
         await asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)
-        self._running = False
+        self._running =  False
+
+async def main():
+    plotter = TerminalPlotter(1000, 1000)
+    mesh = pv.Sphere()
+    plotter.add_mesh(mesh)
+    await plotter.run()
+
+if __name__ == '__main__':
+    import cProfile
+    cProfile.run("asyncio.run(main())", "profile")