diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/MarkerControl.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/MarkerControl.cs
index 6208875a55..f54ae9579c 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/MarkerControl.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/MarkerControl.cs
@@ -31,7 +31,9 @@ namespace BizHawk.Client.EmuHawk
 
 		public void UpdateValues()
 		{
-			Refresh();
+			MarkerView.BlazingFast = true;
+			MarkerView.ItemCount = Tastudio.CurrentMovie.Markers.Count;
+			MarkerView.BlazingFast = false;
 		}
 
 		private void MarkerView_QueryItemBkColor(int index, int column, ref Color color)
diff --git a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs
index 6f06250fe5..e64362dd57 100644
--- a/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs
+++ b/BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.cs
@@ -225,7 +225,9 @@ namespace BizHawk.Client.EmuHawk
 
 		public void RefreshDialog()
 		{
+			TasView.BlazingFast = true;
 			TasView.ItemCount = _tas.InputLogLength + 1;
+			TasView.BlazingFast = false;
 			if (MarkerControl != null)
 			{
 				MarkerControl.Refresh();