why DataContractSerializer is faster that xmlSerializer?

Question

Performance wise, why and how Datacontract serializer is better than xmlserializer ?

Answer 1

From: link and also link2

Is about 10% faster than XmlSerializer to serialize the data because since you don’t have full control over how it is serialize, there is a lot that can be done to optimize the serialization/deserialization process.

The main differences I have noticed:

• The output is not formatted
• The created object does always have it's constructor called, which implies that only one object is created and then the memory is copied for all subsequent objects
• I suspect there are also other improvements relating to the way it casts the types when deserializing the data.