Stress test for FNA dynamic buffer updates using None

FuckNone.cs

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace FuckNone
{
    class FuckNoneGame : Game
    {
        static int BUFFER_SIZE = 8388608;
        static int UPDATES_PER_FRAME = 32;

        GraphicsDeviceManager graphics;

        VertexPositionColorTexture[] vertexData = new VertexPositionColorTexture[BUFFER_SIZE];
        DynamicVertexBuffer buffer;
        BasicEffect effect;

        public FuckNoneGame()
        {
            graphics = new GraphicsDeviceManager(this);
            graphics.PreferredBackBufferWidth = 1280;
            graphics.PreferredBackBufferHeight = 720;
            graphics.PreferMultiSampling = true;
            Content.RootDirectory = "Content";

            Window.AllowUserResizing = true;
            IsMouseVisible = true;

            var random = new System.Random();

            for (var i = 0; i < BUFFER_SIZE; i++)
            {
                vertexData[i] = new VertexPositionColorTexture(
                    new Vector3((float)random.NextDouble(), (float)random.NextDouble(), (float)random.NextDouble()),
                    new Color((float)random.NextDouble(), (float)random.NextDouble(), (float)random.NextDouble(), 1f),
                    new Vector2((float)random.NextDouble(), (float)random.NextDouble())
                );
            }
        }

        protected override void Initialize()
        {
            base.Initialize();

            buffer = new DynamicVertexBuffer(GraphicsDevice, typeof(VertexPositionColorTexture), BUFFER_SIZE, BufferUsage.None);
            buffer.SetData(vertexData, 0, BUFFER_SIZE, SetDataOptions.None);

            effect = new BasicEffect(GraphicsDevice);
        }

        protected override void LoadContent()
        {
            base.LoadContent();
        }

        protected override void UnloadContent()
        {
            base.UnloadContent();
        }

        protected override void Update(GameTime gameTime)
        {
            for (var i = 0; i < UPDATES_PER_FRAME; i++)
            {
                buffer.SetData(vertexData, 0, BUFFER_SIZE, SetDataOptions.None);
            }
            
            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.CornflowerBlue);

            base.Draw(gameTime);
        }
    }
}