为什么.net泛型字典如此之大

Question

我在VB.net中序列化一个通用字典,我很惊讶它是一个单项的大约1.3kb.我做错了什么,或者我还应该做些什么呢？我有大量的词典,它正在杀死我把它们全部发送到网上.我用于序列化的代码是

    Dim dictionary As New Dictionary(Of Integer, Integer)
    Dim stream As New MemoryStream
    Dim bformatter As New BinaryFormatter()

    dictionary.Add(1, 1)

    bformatter.Serialize(stream, dictionary)

    Dim len As Long = stream.Length

Answer 1

字典的默认序列化必须包括字典类型的类型信息,使用的比较器以及每个项目的类型(键和值),因为它们通常可能是子类型.必须为每个字典添加此开销.如果将数据打印为字符串,则可以看到有许多完全限定的类型占用了大量字节:

\ 0\0\0\0 ????\0\0\0\0\0\0\0\0\0\0？System.Collections.Generic.Dictionary 2[[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]\0\0\0\aVersion\bComparer\bHashSize\rKeyValuePairs\0\0\b?System.Collections.Generic.GenericEqualityComparer1 [[System.Int32,mscorlib,Version = 2.0.0.0,Culture = neutral,PublicKeyToken = b77a5c561934e089]]\b？System.Collections.Generic.KeyValuePair 2[[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]][]\0\0\0\t\0\0\0\0\0\0\t\0\0\0\0\0\0?System.Collections.Generic.GenericEqualityComparer1 [[System.Int32,mscorlib,Version = 2.0.0.0,Culture = neutral,PublicKeyToken = b77a5c561934e089]]\0\0\0\0\a\0\0\0\0\0\0\0\0\0\0？System.Collections.Generic.KeyValuePair 2[[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089],[System.Int32, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]?????System.Collections.Generic.KeyValuePair2 [[System.Int32,mscorlib,Version = 2.0.0.0 ,Culture = neutral,PublicKeyToken = b77a5c561934e089],[System.Int32,mscorlib,Version = 2.0.0.0,Culture = neutral,PublicKeyToken = b77a5c561934e089]]\0\0\0keyvalue\0\0\b\b\0\0\0\0符\ v

您可能更喜欢使用自定义格式进行序列化,或者使用稍微轻一些的标准格式(如JSON).