• Jackson 2.1
• Kinds of changes
• Formatting changes: "xxx As Object/Array"
• Enums as Object
• Collections as Object
• POJO as Array
• Performance improvements
• Chunked Binary value reads, writes (JsonParser / JsonGenerator)
• ObjectReader and ObjectWriter pre-fetch (de)serializers
• Ergonomics: "simpler, more intuitive"
• Format auto-detection for Data-binding
• Delegating serializer, deserializer
• Improvements to extension modules
• XML module: support for "unwrapped" Lists