StringBuilder vs XmlWriter Test

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.Xml;

namespace SbVsXmlWriter {
    class Program {

        static XmlWriterSettings setting = new XmlWriterSettings() { OmitXmlDeclaration = true };
        static readonly StringBuilder writerSb = new StringBuilder(1000);
        static readonly XmlWriter writer = XmlWriter.Create(writerSb, setting);
        
        static void Main(string[] args) {

            Test("XmlWriter", UsingXmlWriter);
            Test("XmlWriterWithCacheInternalSB", UsingXmlWriterWithCache);
            Test("StringBuilder", UsingSb);
            Test("StringBuilderWithCache", UsingSbWithCache);
        }

        static void UsingXmlWriterWithCache() {
            writerSb.Clear();
            using (var xmlWriter = XmlWriter.Create(writerSb, setting)) {
                xmlWriter.WriteStartElement("root");

                xmlWriter.WriteStartElement("key");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteStartElement("key2");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteStartElement("key3");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteStartElement("key4");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteEndElement();
                xmlWriter.Flush();
            }
            var result = writerSb.ToString();
        }

        static void UsingXmlWriter() {
            var sb = new StringBuilder(1000);
            using (var xmlWriter = XmlWriter.Create(sb, setting)) {
                xmlWriter.WriteStartElement("root");

                xmlWriter.WriteStartElement("key");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteStartElement("key2");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteStartElement("key3");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteStartElement("key4");
                xmlWriter.WriteString("MyValue");
                xmlWriter.WriteEndElement();

                xmlWriter.WriteEndElement();
                xmlWriter.Flush();
            }
            var result = sb.ToString();
        }

        static StringBuilder sbx = new StringBuilder(1000);
        static void UsingSbWithCache() {
            sbx.Clear();
            sbx.Append("<root>");
            sbx.Append("<key>");
            sbx.Append("MyValue");
            sbx.Append("</key>");
            sbx.Append("<key2>");
            sbx.Append("MyValue");
            sbx.Append("</key2>");
            sbx.Append("<key3>");
            sbx.Append("MyValue");
            sbx.Append("</key3>");
            sbx.Append("<key4>");
            sbx.Append("MyValue");
            sbx.Append("</key4>");
            sbx.Append("</root>");

            var result = sbx.ToString();
        }

        static void UsingSb() {
            var sb = new StringBuilder(1000);
            sb.Append("<root>");
            sb.Append("<key>");
            sb.Append("MyValue");
            sb.Append("</key>");
            sb.Append("<key2>");
            sb.Append("MyValue");
            sb.Append("</key2>");
            sb.Append("<key3>");
            sb.Append("MyValue");
            sb.Append("</key3>");
            sb.Append("<key4>");
            sb.Append("MyValue");
            sb.Append("</key4>");
            sb.Append("</root>");

            var result = sb.ToString();
        }

        static void Test(string name, Action action) {
            var count = 100000000;
            var stopWatch = new Stopwatch();
            stopWatch.Start();
            for (var i = 0; i < count; i++)
                action();
            stopWatch.Stop();
            Console.WriteLine("Iteration: {0}", count);
            Console.WriteLine("Completed {0} in Avg {1} Milliseconds", name, stopWatch.ElapsedMilliseconds);
            Console.WriteLine();
        }
    }
}