探秘GO语言《比较C#与GO的性能--XML序列化》

今天对GO和NET的XML字符串序列化成对象列表做了一个性能比较，得出一些结论。

GO的代码：

package main

import (
	"encoding/xml"
	"io/ioutil"
	"log"
)

type Result struct {
	XMLName xml.Name `xml:"ArrayOfDoc"`
	Persons []Person `xml:"doc"`
}

type Person struct {
	Url          string `xml:"url"`
	Docno        string `xml:"docno"`
	Contenttitle string `xml:"contenttitle"`
	Content      string `xml:"content"`
}

func main() {

	content, err := ioutil.ReadFile("E:\\Xml\\test2.xml")
	if err != nil {
		log.Fatal(err)
	}
	var result Result
	timer2 := time.NewTimer(time.Second)
	err = xml.Unmarshal(content, &result)

	if err != nil {
		log.Fatal(err)
	}
	log.Println(len(result.Persons))
}

　　

NET的代码：

using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using System.Xml;
using System.Xml.Serialization;
using System.Xml.XPath;

namespace ConsoleApplicationDataInsert
{
    class Program
    {
        static void Main(string[] args)
        {
            IList<string> files = new List<string>();
            files.Add(@"E:\Xml\test2.xml");
            int count = 0;
            Console.WriteLine(DateTime.Now.ToString() + "  开始解析");
            foreach (var file in files)
            {
                string xml = File.ReadAllText(file);
                Console.WriteLine(DateTime.Now.ToString() + "  读取完毕");
                var listModel = Deserialize(typeof(List<doc>), xml) as List<doc>;
                count += listModel.Count;
            }

            /*
            List<doc> list = new List<doc>();
            list.Add(new doc() { content = "abdcdsfds", contenttitle = "rewrewre", docno = "rtrwetrew", url = "rewrewrewrew" });
            list.Add(new doc() { content = "abdcfewrwdsfds", contenttitle = "rewrewfdsare", docno = "rtrwetrfdsew", url = "rewrewrefdsfwrew" });
            string xml2 = Serializer(typeof(List<doc>), list);
             * */

            Console.WriteLine(DateTime.Now.ToString() + "  解析完成，总共：" + count);
            Console.Read();
        }

        static object Deserialize(Type type, string xml)
        {
            try
            {
                using (StringReader sr = new StringReader(xml))
                {
                    XmlSerializer xmldes = new XmlSerializer(type);
                    return xmldes.Deserialize(sr);
                }
            }
            catch (Exception e)
            {
                return null;
            }
        }

        static string Serializer(Type type, object obj)
        {
            MemoryStream Stream = new MemoryStream();
            XmlSerializer xml = new XmlSerializer(type);
            try
            {
                //序列化对象
                xml.Serialize(Stream, obj);
            }
            catch (InvalidOperationException)
            {
                throw;
            }
            Stream.Position = 0;
            StreamReader sr = new StreamReader(Stream);
            string str = sr.ReadToEnd();

            sr.Dispose();
            Stream.Dispose();

            return str;
        }
    }

    public class doc
    {
        public string url { get; set; }
        public string docno { get; set; }
        public string contenttitle { get; set; }
        public string content { get; set; }
    }

}

　　

两者都是对一个170M（里面有70203个XML对象）的XML文件进行序列化，将XML字符串序列化成对象列表。

GO每次的运行时间大致是12秒左右。

NET的运行时间大致是2秒左右。

可以看出GO在XML的处理上还是比NET慢了一个档次，希望谷歌以后能优化这个功能。