net自带二进制序列化，XML序列化和ProtoBuf序列化的压缩对比

测试结果：
ProtoBuf Length:115
BinaryFormatter Length:1177
XmlSerializer Length:814
xml length:825
做了一个各种序列化方案的压缩比例测试，可以看到protobuf序列化后的大小是xml原始格式的8分之一，是xml序列化后的8分之一，是二进制序列化的10分之一，总体看来ProtoBuf的优势还是很明显的,不过ProtoBuf.net不是google官方提供的，也许和其它平台不兼容，但如果做.NET服务端应用，两边都是.NET，还是可以适用的，即使有一边不是.NET，反正是开源的东西，协议也有，也可以自己实现相应语言的兼容ProtoBuf.net的协议栈。
SOAPFormatter没有测试，一般用的不多。还有就是怪事了，为什么二进制序列化反而大呢，奇怪了。
本次测试主要考虑协议的压缩率的比较，不考虑序列化/解序列化的速度，官方声明比XML解析要快几十倍，有空看下它的实现代码，我的SVN老下载不下来code.google的代码，汗了。

测试代码如下

internal   class  Program
{
     private   static   void  Main( string [] args)
    {
        MemoryStream ms  =   null ;
        Customer customer  =  Customer.GetOneCustomer();

         using  (ms  =   new  MemoryStream())
        {
            Serializer.Serialize(ms, customer);
            Console.WriteLine( " ProtoBuf Length:{0} " , ms.Length);
        }
         using  (ms  =   new  MemoryStream())
        {
            var formater  =   new  BinaryFormatter();
            formater.Serialize(ms, customer);
            Console.WriteLine( " BinaryFormatter Length:{0} " , ms.Length);
        }
         using  (ms  =   new  MemoryStream())
        {
            var serializer  =   new  XmlSerializer( typeof  (Customer));
            serializer.Serialize(ms, customer);
            Console.WriteLine( " XmlSerializer Length:{0} " , ms.Length);
        }

         string  xml  =
             @" <?xml version=""1.0"" ?>
　<Customer xmlns=""urn:Sep2003Example"">
<CustomerID>ALFKI</CustomerID>
<PO>9572658</PO>
<Address>
    <Street>One Main Street</Street>
    <City>Anywhere</City>
    <State>NJ</State>
    <Zip>08080</Zip>
</Address>
<Order>
    <OrderID>10966</OrderID >
    <LineItem>
        <ProductID>37</ProductID>
        <UnitPrice>26.50 </UnitPrice>
        <Quantity>8</Quantity>
        <Description>Gravad lax </Description>            　
    </LineItem>
    <LineItem>
        <ProductID>56 </ProductID>
        <UnitPrice>38.00</UnitPrice>
        <Quantity>12</Quantity>
        <Description>Gnocchi di nonna Alice</Description>            　
    </LineItem>
</Order>    　
</Customer> " ;
        Console.WriteLine( " xml length:{0} " , Encoding.UTF8.GetByteCount(xml));
        Console.ReadKey();
    }
}

相关数据结构如下 

 

[ProtoContract]
[Serializable]
public   class  Customer {
    [ProtoMember( 1 )]
     public   string  CustomerID {  get ;  set ; }
    [ProtoMember( 2 )]
     public   int  PO {  get ;  set ; }
    [ProtoMember( 3 )]
     public  Address Address {  get ;  set ; }
    [ProtoMember( 4 )]
     public  Order Order {  get ;  set ; }

     public   static  Customer GetOneCustomer() {
        Customer customer  =   new  Customer {
            CustomerID  =   " ALFKI " ,
            PO  =   9572658 ,
            Address  =   new  Address {
                Street  =   " One Main Street " ,
                City  =   " Anywhere " ,
                State  =   " NJ " ,
                Zip  =   08080
            },
            Order  =   new  Order {
                OrderID  =   10966 ,
                LineItems  =   new  List < LineItem >
                    {
                         new  LineItem
                            {
                                ProductID  =   37 ,
                                UnitPrice  =   26.50M ,
                                Quantity  = 8 ,
                                Description  = " Gravad lax "
                            },
                         new  LineItem
                            {
                                ProductID  =   56 ,
                                UnitPrice  =   38.00M ,
                                Quantity  = 12 ,
                                Description  = " Gnocchi di nonna Alice "     
                            }
                    }
            }
        };
         return  customer;
    }
}

[ProtoContract]
[Serializable]
public   class  Address {
    [ProtoMember( 1 )]
     public   string  Street {  get ;  set ; }
    [ProtoMember( 2 )]
     public   string  City {  get ;  set ; }
    [ProtoMember( 3 )]
     public   string  State {  get ;  set ; }
    [ProtoMember( 4 )]
     public   int  Zip {  get ;  set ; }
}

[ProtoContract]
[Serializable]
public   class  Order {
    [ProtoMember( 1 )]
     public   int  OrderID {  get ;  set ; }
    [ProtoMember( 2 )]
     public  List < LineItem >  LineItems {  get ;  set ; }
}

[ProtoContract]
[Serializable]
public   class  LineItem {
    [ProtoMember( 1 )]
     public   int  ProductID {  get ;  set ; }
    [ProtoMember( 2 )]
     public   decimal  UnitPrice {  get ;  set ; }
    [ProtoMember( 3 )]
     public   int  Quantity {  get ;  set ; }
    [ProtoMember( 4 )]
     public   string  Description {  get ;  set ; }
}

相关链接
Protocol Buffers 性能测试
http://hellobmw.com/archives/protocol-buffers-performance.html
Windows Communication Protocols (MCPP)
http://msdn.microsoft.com/en-us/library/cc216513(PROT.10).aspx
浅谈如何使用.NET存储XML数据
http://developer.51cto.com/art/200905/122238.htm
.net下二进制序列化的格式分析[转]
http://www.cnblogs.com/lxinxuan/archive/2006/09/06/496340.html
Protocol Buffers Encoding
http://code.google.com/intl/zh-CN/apis/protocolbuffers/docs/encoding.html