The latest release of Json.NET has a lot of improvements which make it preferable to other techniques. The team has done really a great job to increase the speed of both serialization and deserialization.

Json.NET is faster than both the JavaScriptSerializer and the WCF DataContractJsonSerializer over all scenarios. It reached the level of the XML based DataContractSerializer which is pretty remarkable. Json.NET over binary (BSON) is considerably faster than the .NET BinaryFormatter, too. Another one of the benefits of JSON is its smaller size when compared to equivalent XML. The output of Json.NET is less than half the size of the XML that DataContractSerializer produces. Read more about these tests on James Newton’s post.

Download the latest release of Json.NET and try it yourself!