Is it safe to call SceneView.RepaintAll() frequently?

Hello! I'm creating a simple level editor to get my hands dirty with some Editor/Window scripts. I was having a problem where a Rect drawn on the scene view that follows the mouse would only update once every second or two giving the impression of lag.

What fixed it was simply adding SceneView.RepaintAll(); within OnSceneGUI

I'm just wondering whether there was a reason RepaintAll() wasn't being called frequently? Am I going to run in to issues laters on if RepaintAll is called as often as I am?

Thanks!

This is my OnSceneGUI code:

 void OnSceneGUI(SceneView sceneView)
     {
         float size_x = tiles.x;
         float size_y = tiles.y;
 
         if (showGrid)
         {
             // Draw all X grid lines
             for ( int i = 0; i <= size_x; i++ )
             {
                 // draw a line equal to x and the full height
                 Handles.DrawLine( new Vector3(i,0,0), new Vector3(i,size_y,0) );
             }
             
             // Draw all y grid lines
             for ( int i = 0; i <= size_y; i++ )
             {
                 // draw a line equal to x and the full height
                 Handles.DrawLine( new Vector3(0,i,0), new Vector3(size_x,i,0) );
             }
         }
 
         // check if mouse is over any tiles
         Vector3 mousePosition = HandleUtility.GUIPointToWorldRay(Event.current.mousePosition).origin;
 
         if ( (mousePosition.x > 0 && mousePosition.x < size_x) && (mousePosition.y > 0 && mousePosition.y < size_y) )
         {
             // mouse is within a tile
             int hoverTile_x = (int)Mathf.Floor( mousePosition.x );
             int hoverTile_y = (int)Mathf.Floor( mousePosition.y );
 
             Vector3[] hover_verts = new Vector3[4];
             hover_verts[0] = new Vector3(hoverTile_x,hoverTile_y + 1,0);
             hover_verts[1] = new Vector3(hoverTile_x + 1,hoverTile_y + 1,0);
             hover_verts[2] = new Vector3(hoverTile_x + 1,hoverTile_y,0);
             hover_verts[3] = new Vector3(hoverTile_x,hoverTile_y,0);
             Handles.DrawSolidRectangleWithOutline( hover_verts, new Color(0f,1f,1f,0.5f), Color.white );
 
             SceneView.RepaintAll();
 
         }
 
     }