问画得比SlimDX还快？

EN

                var form = new SlimDX.Windows.RenderForm("Test");
                form.Width = 1280;
                form.Height = 1024;
                SlimDX.Direct3D9.PresentParameters presentParams = new SlimDX.Direct3D9.PresentParameters
                {
                    BackBufferWidth = form.Width,
                    BackBufferHeight = form.Height,
                    DeviceWindowHandle = form.Handle,
                    PresentFlags = SlimDX.Direct3D9.PresentFlags.None,
                    Multisample = SlimDX.Direct3D9.MultisampleType.None,
                    BackBufferCount = 0,
                    PresentationInterval = SlimDX.Direct3D9.PresentInterval.Immediate,
                    SwapEffect = SlimDX.Direct3D9.SwapEffect.Flip,
                    BackBufferFormat = SlimDX.Direct3D9.Format.X8R8G8B8,
                    Windowed = true,
                };

                var device = new SlimDX.Direct3D9.Device(new SlimDX.Direct3D9.Direct3D(), 0, SlimDX.Direct3D9.DeviceType.Hardware, form.Handle, SlimDX.Direct3D9.CreateFlags.HardwareVertexProcessing, presentParams);
                device.Viewport = new SlimDX.Direct3D9.Viewport(0, 0, form.Width, form.Height);
                SlimDX.Direct3D9.Sprite sprite;
                sprite = new SlimDX.Direct3D9.Sprite(device);


   SlimDX.Windows.MessagePump.Run(form, () =>
                        {
                            sprite.Begin(SlimDX.Direct3D9.SpriteFlags.None);
                            device.BeginScene();
                            Stoptimer = Stopwatch.StartNew();
                            Stoptimer.Start();
                            var tx = SlimDX.Direct3D9.Texture.FromStream(device, ms, 0, 0, 0, SlimDX.Direct3D9.Usage.None, SlimDX.Direct3D9.Format.X8R8G8B8, SlimDX.Direct3D9.Pool.Managed, SlimDX.Direct3D9.Filter.None, SlimDX.Direct3D9.Filter.None, 0);

                            Stoptimer.Stop();
                            System.Console.WriteLine(Stoptimer.ElapsedMilliseconds.ToString());
                            sprite.Draw(tx, Color.Transparent);
                            sprite.End();
                            tx.Dispose();
                            device.EndScene();
                            device.Present();
 });

newImage = Image.FromStream(ms);
gmp.DrawImage(newImage, 0, 0);