TagBuilder 性能如此低下?

需要通过ASP.NET MVC生成一个列表,MVC里面根正苗红的HTML生成方式是使用TagBuilder,鉴于性能的需求,对TagBuilder进行了一番性能测试.当然测试需要比较,所以采用三种方式来进行性能测试

(1):TagBuilder的方式

(2):格式化字符串的方式(string.Format)

(3):HtmlTextWriter的方式

测试使用的性能工具是老赵贡献的CodeTimer(有兴趣的可以去老赵的博客上找),感谢一下先.

测试代码如下:

Codeclass Program

    {

        static void Main(string[] args)

        {

            string result1;

            string result2;

            string result3;

            // 先热身

            CodeTimer.Initialize();

            // 针对TagBuilder的性能测试

            CodeTimer.Time("TagBuilder", 1000, () =>

            {

                StringBuilder sb = new StringBuilder();

                TagBuilderTest(sb);

                result1 = sb.ToString();

            });

            // 针对string.format的性能测试

            CodeTimer.Time("String.Format", 1000, () =>

           {

               StringBuilder sb = new StringBuilder();

               StringFormatTest(sb);

               result2 = sb.ToString();

           });

            // 针对HtmlTextWriter的性能测试

            CodeTimer.Time("HtmlTextWriter", 1000, () =>

           {

               HtmlTextWriter writer = new HtmlTextWriter(new StringWriter());

               HtmlWriter(writer);

               result3 = writer.InnerWriter.ToString();

           });

        }



        static void TagBuilderTest(StringBuilder sb)

        {

            for (var i = 0; i < 1000; i++)

            {

                TagBuilder tag = new TagBuilder("div");

                tag.Attributes["id"] = "id1";

                tag.Attributes["title"] = "google?";

                tag.InnerHtml = "goo~~gle";

                sb.Append(tag.ToString());

            }

        }



        static void StringFormatTest(StringBuilder sb)

        {

            for (var i = 0; i < 1000; i++)

            {

                sb.Append(

                    string.Format(@"<div id=""{0}"" title=""{1}"">{2}</div>", "id1", "google?", "goo~~gle")

                    );

            }

        }



        static void HtmlWriter(HtmlTextWriter writer)

        {

            for (var i = 0; i < 1000; i++)

            {

                writer.AddAttribute(HtmlTextWriterAttribute.Id, "id1");

                writer.AddAttribute(HtmlTextWriterAttribute.Title, "google?");

                writer.RenderBeginTag(HtmlTextWriterTag.Div);

                writer.Write("goo~~gle");

                writer.RenderEndTag();

            }

        }

    }

第一次测试结果:

第二次测试结果:

发现测试的数据很稳定,String.Format性能最快,其次是HtmlTextWriter,最次是TagBuilder.鉴于StringFormat不容易修改和没有结构行,决定采用HtmlTextWriter的形式.

觉得TagBuilder可能比较适用于简单的单个标签的生成,毕竟不像HtmlTextWriter那样需要一个TextWriter.