最近在研究web api 2，看了一篇文章，講解如何提升性能的，

在序列化速度的跑分中，Protobuf一騎絕塵，序列化速度快，性能強，體積小，所以打算了解下這個利器

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1：安裝篇

谷歌官方沒有提供.net的實現，所以在nuget上找了一個移植的

Nuget里搜索Protobuf-net，下載，自動添加到項目中

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2：定義數據結構?

using ProtoBuf;namespace ConsoleApplication1 {[ProtoContract]class Person{[ProtoMember(1)]public int Id { get; set; }[ProtoMember(2)]public string Name { get; set; }[ProtoMember(3)]public Address Address { get; set; }}[ProtoContract]class Address{[ProtoMember(1)]public string Line1 { get; set; }[ProtoMember(2)]public string Line2 { get; set; }} }

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3：封裝簡單操作類

按照作者使用習慣，簡單提供了一個Helper類

using System.IO; using System.Text; using ProtoBuf;namespace ConsoleApplication1 {public class ProtobufHelper{/// <summary>/// 序列化/// </summary>/// <typeparam name="T"></typeparam>/// <param name="t"></param>/// <returns></returns>public static string Serialize<T>(T t){using (MemoryStream ms = new MemoryStream()){Serializer.Serialize<T>(ms, t);return Encoding.UTF8.GetString(ms.ToArray());}}/// <summary>/// 反序列化/// </summary>/// <typeparam name="T"></typeparam>/// <param name="content"></param>/// <returns></returns>public static T DeSerialize<T>(string content){using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(content))){T t = Serializer.Deserialize<T>(ms);return t;}}} }

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4：操作體驗

代碼很簡單，就不分開貼了

using System; using System.Collections.Generic; using System.IO;namespace ConsoleApplication1 {class Program{static void Main(string[] args){var p1 = new Person{Id = 1,Name = "八百里開外",Address = new Address{Line1 = "Line1",Line2 = "Line2"}};var p2 = new Person{Id = 2,Name = "一槍",Address = new Address{Line1 = "Flat Line1",Line2 = "Flat Line2"}};List<Person> pSource = new List<Person>() { p1, p2 };string content = ProtobufHelper.Serialize<List<Person>>(pSource);Console.Write(content);//寫入文件File.WriteAllText("D://hello.txt", content);Console.WriteLine("\r\n****解析部分*****");List<Person> pResult = ProtobufHelper.DeSerialize<List<Person>>(content);foreach (Person p in pResult){Console.WriteLine(p.Name);}Console.Read();}} }

控制臺運行結果

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同樣的數據，和Json所占用空間對比，高下立判

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后記

protobuf雖然有千般好，但是我們是在 web api上使用的，前臺js解析不了Protobuf，所以只能用Json咯~！

StackService雖然Github上有2K多個Star,但是收費的。。同樣的事情web api 2也能做到，所以也略過它。

最終作者選擇了跑分測試里面的第二名Jil? https://github.com/kevin-montrose/Jil

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---

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1. With very minimal annotation on the class level

[ProtoContract(ImplicitFields = ImplicitFields.AllPublic)] // only required on the class level class PersonEntity {public string FirstName { get; set; }public string LastName { get; set; } }

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2. Without any annotation (using RuntimeTypeModel)

static void InitializeProtobufRunTime() {var assembly = Assembly.GetAssembly(typeof(PlainEntities.PersonEntity));var types = assembly.GetTypes();foreach (var t in types.Where(x => x.Namespace.Contains("PlainEntities"))){Console.WriteLine("Processing {0}", t.FullName);var meta = RuntimeTypeModel.Default.Add(t, false);var index = 1;// find any derived class for the entityforeach (var d in types.Where(x => x.IsSubclassOf(t))){var i = index++;Console.WriteLine("\tSubtype: {0} - #{1}", d.Name, i);meta.AddSubType(i, d);}// then add the propertiesforeach (var p in t.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.DeclaredOnly).Where(x => x.GetSetMethod() != null)){var i = index++;Console.WriteLine("\tProperty: {0} - #{1}", p.Name, i);meta.AddField(i, p.Name);}} }

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And both the above works quite well without any performance differences.

------------------
TestBinaryEntities
------------------
Process: 100000 items, MemorySize: 7400705, Completed in: 3877 ms, Serialization took: 676 ms, Deserialization took: 2948 ms

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TestProtobufFullyAnnotatedEntities
----------------------------------
Process: 100000 items, MemorySize: 3983490, Completed in: 682 ms, Serialization took: 164 ms, Deserialization took: 253 ms

-------------------------------------
TestProtobufImplicitAnnotatedEntities
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Process: 100000 items, MemorySize: 3983490, Completed in: 595 ms, Serialization took: 104 ms, Deserialization took: 210 ms

-------------------------------
TestProtobufRuntimeRegistration
-------------------------------
Processing ProtobufTestConsole.PlainEntities.BaseEntity
Subtype: PersonEntity - #1
Property: Id - #2
Property: Gender - #3
Processing ProtobufTestConsole.PlainEntities.PersonEntity
Property: FirstName - #1
Property: LastName - #2
Property: Age - #3
Process: 100000 items, MemorySize: 4083490, Completed in: 646 ms, Serialization took: 113 ms, Deserialization took: 232 ms

Looking forward to get this in :)

Also attached the sample project for reference

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轉載于:https://www.cnblogs.com/zhahost/p/5813627.html

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