Ultra fast real-time data display in ObjectListView

olv.cs

// Refresh the data in timer or in live data update callback
this.timer.Tick += (s, e) => {
  // draw the live value
  using (Graphics g = this.dataListView1.CreateGraphics())
  {
    // shrink the drawing area so that the grid line and selection color can be seen.
    Rectangle r = lvi.GetSubItem(4).Bounds;
    r.Inflate(-2, -2);

    // use double buffer to avoid flicker
    using (BufferedGraphics bg = BufferedGraphicsManager.Current.Allocate(g, r))
    {
      // clear the last graphics and draw
      bg.Graphics.Clip = new Region(r);
      bg.Graphics.Clear(this.dataListView1.BackColor);

      ((TextDecoration)(lvi.GetSubItem(4).Decoration)).Text = "Live Data";
      ((TextDecoration)(lvi.GetSubItem(4).Decoration)).DrawText(bg.Graphics, r);
    
      bg.Render(g);
    }
  }
}