更快的深克隆 [英] Faster deep cloning
问题描述
有没有人想要一个框架/班，让我用值.NET对象克隆？我只能用公共读/写属性（即DataContracts）感兴趣，我不在乎，如果引用正确地解析（即collecions其中包含项目的同一个实例两次）。
Does anyone want a framework/class which allows me to clone by values .Net objects? I'm only interested with public read/write properties (namely DataContracts), and I don't care if references are resolved correctly (i.e. collecions which contains the same instance of item twice).
我试图序列化把戏通过的DataContractSerializer （序列化到XML和背部），写了反射克隆类（有时更快/有时慢），并想知道如果有人写一个辅助类，可通过放射和不反射做到这一点。至于现在发射IL是有点太多了我的小脑袋，但我想这将是最终的解决方案。除非有人知道这是比的DataContractSerializer更快的一种替代方法。
I tried serialization trick via DataContractSerializer (serialize to XML and back), wrote reflection-based cloning class (sometimes faster/sometimes slower), and was wondering if someone wrote a helper class which can do this via Emit and not reflection. As for now emitting IL is a little to much for my little brain, but I guess this would be the ultimate solution. Unless someone knows an alternative method which is faster than DataContractSerializer.
非常感谢， 卡罗尔
推荐答案
如果你正在谈论的对象树/图：
If you are talking about an object tree/graph:
编写特定的IL序列化对象是棘手。国际海事组织，最好的办法是看一个完整的序列化，怎么样的DataContractSerializer 将工作 - 但并不一定与该发动机
Writing specific IL to serialize an object is tricky. IMO, your best bet is to look at a full serialization, like how DataContractSerializer would work - but not necessarily with that engine.
例如， protobuf网有一个 Serializer.DeepClone＆LT ; T＆GT; ，这可能有助于方法。它应该比的DataContractSerializer 更快，至少。在当前的时间，你需要添加一些线索串行器（哪怕只是 [ProtoContract（ImplicitFields = ImplicitFields.AllPublic）] ） - 但是，目前的（不完全）工作正在进行中提供POCO支持无属性。
For example, protobuf-net has a Serializer.DeepClone<T> method that might help. It should be faster than DataContractSerializer, at least. At the current time, you need to add some clues for the serializer (even if just [ProtoContract(ImplicitFields=ImplicitFields.AllPublic)]) - however, the current (incomplete) work-in-progress offers POCO support without attributes.
如果你是在谈论单个对象：
If you are talking about individual objects:
有相当简单的事情，你可以在.NET 3.5 防爆pression 在这里做的;建立动态防爆pression 基于反射，并调用 .Compile（）。 MiscUtil 已经有这样的：
There are fairly simple things you can do here with Expression in .NET 3.5; build a dynamic Expression based on reflection, and call .Compile(). MiscUtil has this already:
DestType clone = PropertyCopy<DestType>.CopyFrom(original);
使用.NET 2.0 / 3.0（不含防爆pression ），你可能会考虑的HyperDescriptor 类似的目的。
With .NET 2.0/3.0 (without Expression) you might consider HyperDescriptor for similar purposes.
这篇关于更快的深克隆的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
