函数中的const字符串

Question

来自Mricrosoft XNA教育目录的片段:

    /// <summary>
    /// Draws the control, using SpriteBatch and SpriteFont.
    /// </summary>
    protected override void Draw()
    {
        const string message = "Hello, World!\n" +
                               "\n" +
                               "I'm an XNA Framework GraphicsDevice,\n" +
                               "running inside a WinForms application.\n" +
                               "\n" +
                               "This text is drawn using SpriteBatch,\n" +
                               "with a SpriteFont that was loaded\n" +
                               "through the ContentManager.\n" +
                               "\n" +
                               "The pane to my right contains a\n" +
                               "spinning 3D triangle.";

        GraphicsDevice.Clear(Color.CornflowerBlue);

        spriteBatch.Begin();
        spriteBatch.DrawString(font, message, new Vector2(23, 23), Color.White);
        spriteBatch.End();
    }

Draw每秒调用60次.在抽奖中分配消息是否有任何性能开销？它是否像我将它移动到静态助手类一样？据我所知,成本表达式由C#编译器评估.const修饰符在这里改变了什么？

Answer 1

const只被评估一次.通过将其移动到静态变量中,您什么都得不到.